Flights from Ontario, California to Seattle, United States

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Did you mean flights from Seattle to Ontario, California?

Ontario, California to Seattle Last modified: Jul 4, 2019 2:34 -04:00

We've scanned 48,195,047,545 round trip itineraries and found the cheapest flights to Seattle. United & Major Airlines frequently offer the best deals to Seattle flights, or select your preferred carrier below to see the cheapest days to fly.

United
ONTSEA
Wed 9/11
nonstop
SEAONT
Sat 9/14
nonstop
$137
Major Airlines
ONTSEA
Wed 9/11
nonstop
SEAONT
Sun 9/15
nonstop
$147
Alaska
ONTSEA
Tue 8/20
nonstop
SEAONT
Wed 8/21
nonstop
$157
American
ONTSEA
Mon 8/26
1 stop
SEAONT
Wed 8/28
1 stop
$164

How Much is a Flight from Ontario, California to Seattle?

We have collected flight cost data from across the web for travel from Ontario, California to Seattle, and have found the average flight price for this trip to be $158.

Where To Buy Cheap Flights from Ontario, California to Seattle?

The best way to find a great deal on airfare is to search multiple sites. When you run a search on FareCompare, we search multiple sites and fare sources all at once so you don't have to - which is why we think FareCompare is the best place to find cheap tickets. Airlines can adjust prices for tickets from Ontario, California to Seattle based on the day and time that you decide to book your flight. We have collected data from all airlines, and have found that Tuesdays, Wednesdays, and Saturdays are often the best days to book flights. If you'd like to learn more, read our article about the best time to buy airline tickets.

How far in advance should I book tickets from Ontario, California to Seattle?

The chart below shows up-to-date information regarding how far in advance to book your flight from Ontario, California to Seattle.

Non Stop versus Connecting
Advanced PurchaseNon StopConnecting
< 7 days $398 $264
7-14 days $207 $234
14-21 days $207 $227
21-30 days $192 $207
30-60 days $157 $160
60-90 days $137 $156
90+ days $157 $160

Cheapest Day To Fly from Ontario, California to Seattle

We've examined 57,595,778,181 itinerary searches that we've seen for departures in the next 90 days and found that the cheapest day to fly from Ontario, California to Seattle is Monday. See the chart below to compare prices for other days of the week.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$147$157$157$167$160$157$160

Compare Flight Prices from Ontario, California to Seattle by Month

Low priced flights are most commonly available by purchasing between one and three months in advance. International or holiday flights may need to be purchased even further in advance. The chart below shows the cheapest flight prices by month for Ontario, California to Seattle flights.

Month Origin Destination Carrier Depart Date Return Date Stops Price
July Ontario, California Seattle Alaska 7/16/19 7/18/19 0 $188
August Ontario, California Seattle Alaska 8/20/19 8/24/19 0 $157
September Ontario, California Seattle Alaska 9/16/19 9/18/19 0 $147
October Ontario, California Seattle Alaska 10/1/19 10/5/19 0 $157
November Ontario, California Seattle United 11/9/19 11/13/19 1 $160
December Ontario, California Seattle Major Airlines 12/5/19 12/10/19 1 $174
January Ontario, California Seattle American 1/25/20 1/28/20 1 $164
February Ontario, California Seattle Alaska 2/21/20 2/28/20 0 $328

Cheap Last Minute Flights from Ontario, California to Seattle

Looking for cheap last minute flights or a weekend getaway? We've got you covered with weekend flight deals from Ontario, California to Seattle. The chart below shows the best last minute deals and cheap flights this weekend we could find.

Next 30 Days

SunMonTueWedThuFriSat
30 1 2 3 4 5 6
$319
7 8 9 10 11 12 13
$319 $298
14 15 16 17 18 19 20
$298 $239
21 22 23 24 25 26 27
$239 $258
28 29 30 31 1 2 3
$258 $212
4 5 6 7 8 9 10
$212

Connecting Flights vs Direct Flights from Ontario, California to Seattle

Flights between some cities may be significantly cheaper if you choose 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 Ontario, California to Seattle is $240.

The average price for direct flights from Ontario, California to Seattle is $254.

One Way Flights vs Round Trip Flights from Ontario, California to Seattle

We have found that there is often no price difference between buying a round trip flight versus a one way flight. Increased flexibility is the main benefit when it comes to buying a one way flight from Ontario, California to Seattle. However, booking a round trip flight can be a simpler process. You can compare round trip and one way flights by using our flight comparison.

The average price for one way flights from Ontario, California to Seattle is $97.

The average price for round trip flights from Ontario, California to Seattle is $224.

Ontario, California to Seattle Flight Questions

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

Question: What are the most popular connecting cities when flying from Ontario, California to Seattle?
Answer: San Francisco, CA

Airlines in Ontario, California flying to Seattle Last modified: Jul 4, 2019 2:34 -04:00Number of routes searched: 114Number of itineraries searched: 159,067

Wondering which airlines fly out of Ontario, California to Seattle? We've gathered the average price of Ontario, California airlines with flights to Seattle. Different airlines offer different levels of comfort and service, so consider convenience when choosing your airline.

Below is the full flight schedule summary showing which days of the week individual carriers offer flights for the next 30 days.

Ontario, California to Seattle
Airline Connections Mon Tue Wed Thu Fri Sat Sun
American -
Alaska -
Major Airlines -
United -
American PHX
American DFW
Alaska PDX
Alaska SJC
Alaska SAN
Alaska SFO
Major Airlines ATL
Major Airlines SLC
Major Airlines LAS
Frontier AUS
Frontier DEN
United DEN
United SFO
United IAH

Ontario, California to Seattle Airports

These are the major commercial airports we're currently monitoring in Ontario, California and Seattle. If your route includes a city with multiple airports, you may be able to find substantial savings by choosing an alternate airport.

Farecompare Research Tools

FareCompare's Flight Schedule Search Tool helps you find information about airline schedule filings, including flight numbers, depart times, and travel distance.

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Cheap Flights from Ontario, California to Seattle