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Did you mean flights from Ontario, California to St Louis?

Flights from St Louis to Ontario, United States

TIPSave $360 by flying into Las Vegas, Nevada instead of Ontario, California from St Louis

St Louis to Ontario, California Last modified: Feb 20, 2017 3:04 -05:00Prices shown were found by travelers like you over the past 30 days

We've scanned 24,776,132,623 round trip itineraries and found the cheapest flights to Ontario, California. American & Alaska frequently offer the best deals to Ontario, California flights, or select your preferred carrier below to see the cheapest days to fly.

American
STLONT
Thu 3/23
1 stop
ONTSTL
Tue 3/28
1 stop
$326
Alaska
STLONT
Sat 4/15
1 stop
ONTSTL
Thu 4/20
1 stop
$334
United
STLONT
Thu 3/23
1 stop
ONTSTL
Mon 3/27
1 stop
$363

How Much is a Flight from St Louis to Ontario, California? Prices shown were found by travelers like you over the past 30 days

We have collected flight cost data from across the web for travel from St Louis to Ontario, California, and have found the average flight price for this trip to be $340.

Where To Buy Cheap Flights from St Louis to Ontario, California?

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 St Louis to Ontario, California 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 St Louis to Ontario, California? Prices shown were found by travelers like you over the past 30 days

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

Non Stop versus Connecting
Advanced PurchaseNon StopConnecting
< 7 days $0 $0
7-14 days $0 $520
14-21 days $0 $0
21-30 days $0 $365
30-60 days $413 $326
60-90 days $0 $326
90+ days $0 $404

Cheapest Day To Fly from St Louis to Ontario, California Prices shown were found by travelers like you over the past 30 days

We've examined 24,790,690,144 itinerary searches that we've seen for departures in the next 90 days and found that the cheapest day to fly from St Louis to Ontario, California is Monday. See the chart below to compare prices for other days of the week.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$326$326$362$326$362$334 

Compare Flight Prices from St Louis to Ontario, California by Month Prices shown were found by travelers like you over the past 30 days

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 St Louis to Ontario, California flights.

Month Origin Destination Carrier Depart Date Return Date Stops Price
February St Louis Ontario, California American 2/27/17 3/7/17 1 $520
March St Louis Ontario, California American 3/23/17 3/28/17 1 $326
April St Louis Ontario, California American 4/18/17 4/25/17 1 $326
May St Louis Ontario, California American 5/11/17 5/17/17 1 $404
June St Louis Ontario, California American 6/1/17 6/17/17 1 $404
July St Louis Ontario, California American 7/11/17 7/18/17 1 $404
August St Louis Ontario, California American 8/15/17 8/23/17 2 $434
October St Louis Ontario, California American 10/12/17 10/15/17 1 $430

Cheap Last Minute Flights from St Louis to Ontario, California Prices shown were found by travelers like you over the past 30 days

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

Next 30 Days

SunMonTueWedThuFriSat
19 20 21 22 23 24 25
$326
26 27 28 29 30 31 1
$326

Connecting Flights vs Direct Flights from St Louis to Ontario, California Prices shown were found by travelers like you over the past 30 days

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 St Louis to Ontario, California is $402.

The average price for direct flights from St Louis to Ontario, California is not available.

One Way Flights vs Round Trip Flights from St Louis to Ontario, California Prices shown were found by travelers like you over the past 30 days

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 St Louis to Ontario, California. 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 St Louis to Ontario, California is not available.

The average price for round trip flights from St Louis to Ontario, California is $424.

St Louis to Ontario, California Flight Questions

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

Question: What are the most popular connecting cities when flying from St Louis to Ontario, California?
Answer: Chicago, IL

Airlines in St Louis flying to Ontario, California Last modified: Feb 20, 2017 3:04 -05:00Number of routes searched: 134Number of itineraries searched: 29,108

Wondering which airlines fly out of St Louis to Ontario, California? We've gathered the average price of St Louis airlines with flights to Ontario, California. 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.

St Louis to Ontario, California
Airline Connections Mon Tue Wed Thu Fri Sat Sun
American -
Alaska -
American PHX
American CLT
American DCA
American DFW
Alaska PDX
Alaska SEA
Alaska DCA
Major Airlines SLC
Major Airlines ATL
Major Airlines CVG
Major Airlines DTW
Major Airlines MSP
United DEN
United SFO
United IAH
United ORD

St Louis to Ontario, California Airports

These are the major commercial airports we're currently monitoring in St Louis and Ontario, California. 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.

Cheap Flights from St Louis to Ontario, California