Flights
Hotels
From
To
1 traveler
Unsupported Browser!
Find Flights
Finding cheap flights is simple. More than 36 million people last year saved hundreds by using our flights tool.
Flights
Hotels
Round-trip
One-way
1 traveler
Unsupported Browser!
Find Flights
Finding cheap flights is simple. More than 36 million people last year saved hundreds by using our flights tool.
Did you mean flights from Frankfurt to Boston?

Cheap Flights from Boston to Frankfurt, DE, Germany - BOS to FRA Last modified: Aug 24, 2016 12:45 AM

Popular flights from Boston to Frankfurt Last modified: Aug 24, 2016 12:45 AM

We’ve got the inside scoop on finding the best time to fly for the best price. Not sure when to travel for your next vacation? Find details below on when-to-fly and when-to-buy.

Air Canada
BOSFRA
Sun 11/27
1 stop
FRABOS
Sat 12/10
1 stop
$519
Select
United
BOSFRA
Wed 11/23
1 stop
FRABOS
Wed 11/30
1 stop
$519
Select
United
BOSFRA
Mon 11/28
nonstop
FRABOS
Tue 12/6
nonstop
$519
Select
Icelandair
BOSFRA
Wed 11/2
1 stop
FRABOS
Sun 11/6
1 stop
$535
Select
Icelandair
BOSFRA
Wed 11/16
1 stop
FRABOS
Wed 11/30
1 stop
$535
Select
Lufthansa
BOSFRA
Sun 11/27
nonstop
FRABOS
Sat 12/10
nonstop
$536
Select
Lufthansa
BOSFRA
Sun 11/27
1 stop
FRABOS
Sat 12/10
1 stop
$536
Select
Lufthansa
BOSFRA
Thu 12/1
nonstop
FRABOS
Thu 12/15
nonstop
$536
Select
Lufthansa
BOSFRA
Thu 12/1
1 stop
FRABOS
Thu 12/15
1 stop
$536
Select
Turkish
BOSFRA
Sat 9/3
1 stop
FRABOS
Sun 9/11
1 stop
$546
Select
Turkish
BOSFRA
Fri 9/9
1 stop
FRABOS
Sun 9/25
1 stop
$546
Select
Turkish
BOSFRA
Wed 9/14
1 stop
FRABOS
Tue 9/20
1 stop
$546
Select
Turkish
BOSFRA
Thu 9/15
1 stop
FRABOS
Tue 9/20
1 stop
$546
Select
Turkish
BOSFRA
Thu 9/15
1 stop
FRABOS
Thu 9/29
1 stop
$546
Select
Brussels
BOSFRA
Thu 12/1
2 stops
FRABOS
Thu 12/15
2 stops
$556
Select
Swiss
BOSFRA
Mon 11/28
1 stop
FRABOS
Mon 12/5
1 stop
$559
Select
Swiss
BOSFRA
Tue 11/29
1 stop
FRABOS
Wed 12/7
1 stop
$559
Select
Swiss
BOSFRA
Wed 11/30
1 stop
FRABOS
Wed 12/7
1 stop
$559
Select
Swiss
BOSFRA
Wed 11/30
1 stop
FRABOS
Fri 12/16
1 stop
$559
Select
Swiss
BOSFRA
Mon 12/5
1 stop
FRABOS
Mon 12/12
1 stop
$559
Select
Austrian
BOSFRA
Tue 11/22
2 stops
FRABOS
Wed 11/30
2 stops
$575
Select
Austrian
BOSFRA
Sat 11/26
2 stops
FRABOS
Wed 12/14
2 stops
$575
Select
Austrian
BOSFRA
Tue 11/29
2 stops
FRABOS
Wed 12/7
2 stops
$575
Select
Austrian
BOSFRA
Mon 12/12
2 stops
FRABOS
Fri 12/30
2 stops
$575
Select
WOW air
BOSFRA
Tue 10/25
1 stop
FRABOS
Sun 11/6
1 stop
$643
Select
WOW air
BOSFRA
Sat 11/12
1 stop
FRABOS
Sun 11/20
1 stop
$643
Select
WOW air
BOSFRA
Wed 11/16
1 stop
FRABOS
Wed 11/30
1 stop
$643
Select
Tap Portugal
BOSFRA
Wed 9/28
1 stop
FRABOS
Thu 10/13
1 stop
$718
Select
Tap Portugal
BOSFRA
Sun 10/9
1 stop
FRABOS
Mon 10/17
1 stop
$718
Select
Tap Portugal
BOSFRA
Tue 10/11
1 stop
FRABOS
Wed 10/19
1 stop
$718
Select
Tap Portugal
BOSFRA
Fri 10/14
1 stop
FRABOS
Mon 10/24
1 stop
$718
Select
FlexFlight
BOSFRA
Sun 11/6
1 stop
FRABOS
Wed 11/9
1 stop
$734
Select
SATA
BOSFRA
Tue 11/22
2 stops
FRABOS
Thu 12/1
2 stops
$769
Select
Aer Lingus
BOSFRA
Mon 10/31
1 stop
FRABOS
Wed 11/9
1 stop
$785
Select
SAS
BOSFRA
Wed 11/2
1 stop
FRABOS
Sun 11/6
1 stop
$790
Select
SAS
BOSFRA
Wed 11/16
1 stop
FRABOS
Wed 11/30
1 stop
$790
Select
American
BOSFRA
Wed 11/30
1 stop
FRABOS
Sun 12/4
1 stop
$854
Select
Air France
BOSFRA
Sun 11/20
1 stop
FRABOS
Sat 12/3
1 stop
$873
Select
Air France
BOSFRA
Thu 12/1
1 stop
FRABOS
Tue 12/6
1 stop
$873
Select
Air France
BOSFRA
Thu 12/1
1 stop
FRABOS
Thu 12/8
1 stop
$873
Select
Air France
BOSFRA
Tue 12/20
1 stop
FRABOS
Mon 1/9
1 stop
$873
Select
KLM
BOSFRA
Thu 12/1
1 stop
FRABOS
Thu 12/15
1 stop
$873
Select
Singapore
BOSFRA
Wed 10/19
1 stop
FRABOS
Wed 10/26
1 stop
$877
Select
Singapore
BOSFRA
Wed 10/26
1 stop
FRABOS
Fri 11/4
1 stop
$877
Select
Singapore
BOSFRA
Wed 10/26
1 stop
FRABOS
Wed 11/9
1 stop
$877
Select
Singapore
BOSFRA
Mon 10/31
1 stop
FRABOS
Wed 11/9
1 stop
$877
Select
Singapore
BOSFRA
Mon 11/7
1 stop
FRABOS
Fri 11/11
1 stop
$877
Select
Air Berlin
BOSFRA
Mon 9/19
2 stops
FRABOS
Tue 10/4
2 stops
$885
Select
Air Berlin
BOSFRA
Mon 9/19
2 stops
FRABOS
Wed 10/5
2 stops
$885
Select
British Airways
BOSFRA
Thu 9/22
1 stop
FRABOS
Sat 9/24
1 stop
$896
Select
Alitalia
BOSFRA
Mon 12/19
1 stop
FRABOS
Sun 1/8
1 stop
$901
Select
Iberia
BOSFRA
Sun 11/20
1 stop
FRABOS
Sat 12/3
1 stop
$921
Select
Iberia
BOSFRA
Thu 12/1
1 stop
FRABOS
Thu 12/8
1 stop
$921
Select
Finnair
BOSFRA
Thu 12/8
1 stop
FRABOS
Wed 12/21
1 stop
$922
Select
Air Europa
BOSFRA
Wed 9/14
2 stops
FRABOS
Tue 9/20
2 stops
$1,195
Select
Virgin Atlantic
BOSFRA
Wed 10/19
1 stop
FRABOS
Wed 11/2
1 stop
$1,416
Select
SATA Air Acores
BOSFRA
Wed 11/23
2 stops
FRABOS
Sun 11/27
2 stops
$3,095
Select
JetBlue
BOSFRA
Thu 12/1
2 stops
FRABOS
Thu 12/15
2 stops
$4,269
Select
Ethiopian
BOSFRA
Sun 9/11
2 stops
FRABOS
Fri 9/16
2 stops
$4,425
Select
Ethiopian
BOSFRA
Mon 9/19
2 stops
FRABOS
Fri 9/23
2 stops
$4,425
Select
Ethiopian
BOSFRA
Wed 10/12
2 stops
FRABOS
Wed 10/26
2 stops
$4,425
Select
Ethiopian
BOSFRA
Wed 10/12
3 stops
FRABOS
Wed 10/26
3 stops
$4,425
Select
Ethiopian
BOSFRA
Sun 10/16
2 stops
FRABOS
Fri 10/21
2 stops
$4,425
Select
Emirates
BOSFRA
Wed 9/14
1 stop
FRABOS
Tue 9/20
1 stop
$13,244
Select
Emirates
BOSFRA
Fri 9/16
1 stop
FRABOS
Mon 9/26
1 stop
$13,244
Select
Emirates
BOSFRA
Thu 9/29
1 stop
FRABOS
Thu 10/6
1 stop
$13,244
Select
Emirates
BOSFRA
Wed 11/2
1 stop
FRABOS
Sun 11/6
1 stop
$13,244
Select
Emirates
BOSFRA
Thu 12/15
1 stop
FRABOS
Fri 12/30
1 stop
$13,244
Select

How Much Does it Cost to Fly from Boston to Frankfurt (BOS to FRA)?

We have collected flight cost data from across the web for travel from Boston to Frankfurt, and have found the average flight price for this trip to be $535.

When Can I Buy the Cheapest Flight from Boston to Frankfurt (BOS to FRA)?

Airlines can adjust prices for plane tickets from Boston to Frankfurt based on the day and time that you decide to book your flight. We have collected data from all airlines, and have discovered that the best days to book flights are Tuesdays, Wednesdays, and Saturdays. Read our article to find more information about the best time to buy airline tickets.

How far in advance should you book flights from Boston to Frankfurt

The chart below shows up-to-date information regarding how far in advance a flight from Boston to Frankfurt should be booked.

Non Stop versus 1-Stop
Advanced PurchaseNon StopOne Stop
< 7 days $1,793 $721
7-14 days $1,518 $546
14-21 days $1,193 $546
21-30 days $1,180 $546
30-60 days $1,178 $542
60-90 days $525 $522
90+ days $519 $519

Cheapest Day To Fly from Boston to Frankfurt

The chart below shows up-to-date information regarding the cheapest days to fly from Boston to Frankfurt.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$525 $522 $535 $542 $546 $546 $525

Lowest Fares Chart By Month from Boston to Frankfurt

The chart below shows the lowest fare by month when flying from Boston to Frankfurt.

Month Origin Destination Carrier Depart Date Return Date Stops Price
August Boston Frankfurt Turkish 8/31/16 9/7/16 1 $553
September Boston Frankfurt Turkish 9/3/16 9/11/16 1 $546
October Boston Frankfurt Icelandair 10/19/16 10/25/16 1 $542
November Boston Frankfurt Air Canada 11/27/16 12/10/16 1 $519
December Boston Frankfurt Air Canada 12/3/16 12/10/16 1 $525
January Boston Frankfurt Turkish 1/15/17 1/25/17 1 $546
February Boston Frankfurt Turkish 2/17/17 2/21/17 1 $546
March Boston Frankfurt Turkish 3/3/17 3/12/17 1 $546

Cheapest Weekend Non-Stop Flights for the Next 30 Days from Boston to Frankfurt

If you're ready to take a trip in the next 30 days and want to fly on the weekend, you might be wondering which weekend is the cheapest to fly. The chart below shows up-to-date data regarding weekend flight prices from Boston to Frankfurt.

Next 30 Days

SunMonTueWedThuFriSat
21 22 23 24 25 26 27
$2,060
28 29 30 31 1 2 3
$2,060 $1,935
4 5 6 7 8 9 10
$1,935 $1,618
11 12 13 14 15 16 17
$1,618 $1,268
18 19 20 21 22 23 24
$1,268 $1,268
25 26 27 28 29 30 1
$1,268
TIPSave $8 by flying into Munich instead of Frankfurt from Boston

Non-Stop vs Connecting Flights from Boston to Frankfurt (BOS to FRA)

Your Boston to Frankfurt flight can be significantly cheaper by choosing a multi-stop airline ticket. Although these connecting flights sacrifice some convenience, on average, travelers save 20%-60% when they choose to fly multi-stop versus a direct flight.

The average price for connecting flights from Boston to Frankfurt is $1,429.

The average price for non-stop flights from Boston to Frankfurt is $533.

The chart below shows up to date information regarding non-stop flights from Boston to Frankfurt.

Nonstop Flight Details from Boston to Frankfurt
CarrierMonTueWedThuFriSatSunEarliest FlightLatest Flight
Lufthansa 2 2 2 2 2 2 2 17:00 22:15

Boston to Frankfurt Flight Questions

Below are some common questions that asked about this flight route:

Question: How long is a direct flight from Boston to Frankfurt?
Answer: The average Boston to Frankfurt flight time is 6 hours and 55 minutes.
Question: How many miles are there between Boston and Frankfurt?
Answer: The distance from Boston to Frankfurt is 3658 miles.
Question: How common are direct flights from Boston to Frankfurt?
Answer: There are 14 direct flights from Boston to Frankfurt.
Question: What is the most popular airline for non-stop flights from Boston to Frankfurt?
Answer: Lufthansa German Airlines provides 100% of the non-stop flights between Boston and Frankfurt.
Question: What are the most popular connecting cities when flying from Boston to Frankfurt?
Answer: Paris, FR

Airlines Flying from Boston to Frankfurt (BOS to FRA) Number of flights searched: 368Last modified: Aug 24, 2016 12:45 AM

Below are the different airlines that fly from Boston to Frankfurt with the average price of their plane tickets. Just remember that different airlines offer different levels of comfort and service, so consider convenience when choosing your airline.

Below is the full flight schedule summary of the next 30 days for flights from Boston to Frankfurt.

Boston to Frankfurt
Airline Connections Mon Tue Wed Thu Fri Sat Sun
American PHL X X X X X X X
Air Berlin DUS / TXL X X X X
Air Canada YOW X X X X X X X
Air France CDG X X X X X X X
Alitalia FCO X X X X X X X
Alitalia FCO / LIN X X X X X X X
British Airways LHR X X X X X X X
Delta JFK X X X X X X X
Aer Lingus DUB X X X X X X X
Icelandair KEF X X X X X X X
Iberia MAD X X X X X X X
Lufthansa - X X X X X X X
Lufthansa MUC X X X X X X X
Swiss ZRH X X X X X X X
SAS CPH X X X X X X X
Turkish IST X X X X X X X
Tap Portugal LIS X X X X X X X
United EWR X X X X X X X

Airports for Your Route

These pages contain information about the major airports in Boston and Frankfurt, so you can feel comfortable knowing how to get around whether you are about to take off or you just landed.

Cheap International Flights from Boston - BOS

FlightsAirlineLowest Price
Boston to London American, Air Berlin, Air Canada, Air France, AeroMexico, Royal Air Maroc, Avianca, Finnair, Alitalia, British Airways, Cathay, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Icelandair, Iberia, Latam Airlines Brasil, KLM, Lufthansa, Swiss, El Al, Austrian, SATA, SAS, Brussels, Turkish, Tap Portugal, United, Air Europa, Virgin Atlantic, WestJet, WOW air $444
Boston to Paris American, Air Berlin, Air Canada, Air France, AeroMexico, Royal Air Maroc, Finnair, Alitalia, British Airways, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Icelandair, Iberia, Latam Airlines Brasil, KLM, Lufthansa, Swiss, El Al, China Eastern, Austrian, SATA, SAS, Brussels, Turkish, Tap Portugal, United, Air Europa, Virgin Atlantic, WOW air $379

Cheap Domestic Flights to Frankfurt - FRA

FlightsAirlineLowest Price
New York to Los Angeles American, Alaska, JetBlue, Delta, Spirit, Sun Country, United, Virgin America $224
New York to Chicago American, Alaska, JetBlue, Delta, Spirit, United $77

Cheap International Flights to Frankfurt - FRA

FlightsAirlineLowest Price
New York to Frankfurt American, Air Berlin, Air Canada, Air France, AeroMexico, Royal Air Maroc, Avianca, Finnair, Alitalia, British Airways, airBaltic, China Airlines, Condor, Delta, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, Latam Airlines Brasil, Korean, KLM, Lufthansa, LOT, Swiss, El Al, Egyptair, Thomas Cook, China Eastern, Czech, Austrian, UIA, TAROM, South African, Brussels, Singapore, Aeroflot, Turkish, Tap Portugal, United, Air Europa $535
Newark to Frankfurt American, Air Canada, Air France, Avianca, Finnair, British Airways, Air China, China Airlines, Delta, Aer Lingus, Emirates, Ethiopian, Icelandair, Iberia, KLM, Lufthansa, Swiss, El Al, Austrian, SAS, Brussels, Tap Portugal, United, WOW air $535
Hartford to Frankfurt American, Air Canada, Air France, Finnair, British Airways, Delta, Aer Lingus, Etihad, Iberia, KLM, Lufthansa, Turkish, United $739
New York to London American, Air Berlin, Air Canada, Air France, Air India, AeroMexico, Royal Air Maroc, Avianca, Finnair, Alitalia, British Airways, airBaltic, Cathay, China Southern, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, Meridiana, Latam Airlines Brasil, Korean, KLM, Kuwait, Lufthansa, LOT, Swiss, El Al, Egyptair, China Eastern, Austrian, UIA, TAROM, South African, Brussels, Aeroflot, Saudi Arabian, Turkish, Tap Portugal, United, Air Europa, Virgin Atlantic, WestJet $263
Burlington to Frankfurt American, Air Canada, Air France, Delta, KLM, Turkish, Tap Portugal, United $975
Albany to Frankfurt American, Air Canada, Air France, British Airways, Delta, KLM, Lufthansa, Brussels, United $1,106
Portland to Frankfurt American, Air Canada, Air France, Delta, JAL, KLM, All Nippon, Austrian, Turkish, Tap Portugal, United $1,233
Providence to Frankfurt American, Air Canada, Air France, Condor, Delta, KLM, Lufthansa, Brussels, United $1,105
Bangor to Frankfurt American, Air France, Delta, KLM, United $1,208
Manchester to Frankfurt American, Air Canada, Delta, KLM, United $1,157
New York to Paris American, Air Berlin, Air Canada, Air France, AeroMexico, Royal Air Maroc, Avianca, Finnair, Alitalia, British Airways, EVA Air, airBaltic, Delta, Norwegian Shuttle, OpenSkies, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, Meridiana, Latam Airlines Brasil, Korean, KLM, Lufthansa, LOT, Swiss, El Al, Egyptair, Thomas Cook, China Eastern, Czech, Austrian, UIA, XL Airways, Brussels, Aeroflot, Saudi Arabian, Turkish, Tap Portugal, United, Air Europa, Vietnam, Virgin Atlantic $477
Westchester County to Frankfurt American, Delta, Etihad, KLM, Lufthansa, United $2,233
Newburgh to Frankfurt American, Delta, KLM $1,208
Nantucket to FrankfurtCheck Dates
Hyannis to FrankfurtCheck Dates
New York to Amsterdam American, Air Canada, Air France, AeroMexico, Royal Air Maroc, Finnair, Alitalia, British Airways, airBaltic, Copa, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, Korean, KLM, Lufthansa, LOT, Swiss, El Al, Thomas Cook, China Eastern, Czech, Austrian, UIA, Qatar, TAROM, Brussels, Aeroflot, Turkish, Tap Portugal, United, Air Europa, Virgin Atlantic $456
New York to Dusseldorf American, Air Berlin, Air Canada, Air France, Finnair, Alitalia, British Airways, airBaltic, Cathay, Delta, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, Meridiana, Korean, KLM, Lufthansa, LOT, Swiss, Czech, Austrian, UIA, Singapore, Aeroflot, Turkish, Tap Portugal, United, Air Europa $545
New York to Munich American, Air Berlin, Air Canada, Air France, Air India, Royal Air Maroc, Avianca, Finnair, Alitalia, British Airways, airBaltic, Air China, Cathay, Condor, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, Meridiana, JAL, Korean, KLM, Lufthansa, LOT, Swiss, El Al, Egyptair, Thomas Cook, China Eastern, All Nippon, Austrian, Asiana, UIA, Royal Jordanian, TAROM, South African, Brussels, Singapore, Aeroflot, Saudi Arabian, Turkish, Tap Portugal, United, Air Europa $522
New York to Zurich American, Air Berlin, Air Canada, Air France, AeroMexico, Royal Air Maroc, Finnair, Alitalia, British Airways, airBaltic, Cathay, Delta, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, Meridiana, Korean, KLM, Lufthansa, LOT, Swiss, El Al, Egyptair, Austrian, UIA, South African, Brussels, Aeroflot, Turkish, Tap Portugal, United, Air Europa $593
Newark to London American, Air Canada, Air France, Air India, Avianca, Finnair, B0, British Airways, Air China, Cathay, Delta, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, KLM, Lufthansa, Swiss, El Al, Austrian, SAS, Brussels, Tap Portugal, United, Virgin Atlantic, WOW air $481
New York to Berlin American, Air Berlin, Air Canada, Air France, Royal Air Maroc, Finnair, Alitalia, British Airways, airBaltic, Cathay, Delta, Norwegian Shuttle, Aer Lingus, Etihad, Icelandair, Iberia, Meridiana, KLM, Lufthansa, Swiss, El Al, Egyptair, Austrian, UIA, Brussels, Singapore, Aeroflot, Turkish, Tap Portugal, United, Air Europa $511
New York to Rome American, Air Berlin, Air Canada, Air France, AeroMexico, Royal Air Maroc, Finnair, Alitalia, British Airways, airBaltic, Air China, China Airlines, Cathay, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Etihad, Icelandair, Iberia, Meridiana, JAL, Air Serbia, Korean, KLM, Latam Airlines Group, Lufthansa, Swiss, El Al, Egyptair, China Eastern, Czech, Austrian, Asiana, UIA, Royal Jordanian, TAROM, South African, Brussels, Aeroflot, Turkish, Tap Portugal, United, Air Europa $459
New York to Prague American, Air Berlin, Air Canada, Air France, AeroMexico, Finnair, Alitalia, British Airways, airBaltic, China Airlines, Cathay, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Iberia, Azal, Air Serbia, Korean, KLM, Lufthansa, LOT, Swiss, Egyptair, Czech, Austrian, UIA, TAROM, Brussels, Aeroflot, Turkish, Tap Portugal, United, Air Europa $491
New York to Barcelona American, Air Berlin, Air Canada, Air France, AeroMexico, Royal Air Maroc, Avianca, Finnair, Alitalia, British Airways, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Icelandair, Iberia, Latam Airlines Brasil, Korean, KLM, Lufthansa, LOT, Swiss, El Al, Austrian, UIA, TAROM, Brussels, Aeroflot, Turkish, Tap Portugal, United, Air Europa $485
New York to Milan American, Air Berlin, Air Canada, Air France, Air India, AeroMexico, Royal Air Maroc, Finnair, Alitalia, JetBlue, British Airways, airBaltic, Air China, Cathay, Delta, Norwegian Shuttle, Aer Lingus, Emirates, Etihad, Icelandair, Air Italy, Iberia, Meridiana, Latam Airlines Brasil, Air Serbia, Korean, KLM, Latam Airlines Group, Lufthansa, LOT, Swiss, El Al, Egyptair, Czech, Austrian, UIA, South African, Brussels, Singapore, Aeroflot, Saudi Arabian, Turkish, Tap Portugal, United, Air Europa $455
Newark to Paris American, Air Canada, Air France, Finnair, B0, British Airways, Cathay, Delta, OpenSkies, Aer Lingus, Ethiopian, Icelandair, Iberia, KLM, Lufthansa, Swiss, El Al, Austrian, SAS, Brussels, Tap Portugal, United, WOW air $494
Cheap Flights from Boston to Frankfurt, DE, Germany, from $519 Round trip from BOS to FRA