Flights from Ontario, California to St Louis, United States

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

Ontario, California to St Louis 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 St Louis. American & Major Airlines frequently offer the best deals to St Louis flights, or select your preferred carrier below to see the cheapest days to fly.

American
ONTSTL
Wed 7/24
1 stop
STLONT
Tue 7/30
1 stop
$388
Major Airlines
ONTSTL
Wed 8/14
1 stop
STLONT
Wed 8/28
1 stop
$388
United
ONTSTL
Wed 7/24
1 stop
STLONT
Tue 7/30
1 stop
$388
Alaska
ONTSTL
Tue 9/17
1 stop
STLONT
Fri 9/20
1 stop
$418

How Much is a Flight from Ontario, California to St Louis?

We have collected flight cost data from across the web for travel from Ontario, California to St Louis, and have found the average flight price for this trip to be $412.

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

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 St Louis 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 St Louis?

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

Non Stop versus Connecting
Advanced PurchaseNon StopConnecting
< 7 days $771 $615
7-14 days $664 $615
14-21 days $639 $388
21-30 days $494 $388
30-60 days $601 $388
60-90 days $0 $404
90+ days $0 $388

Cheapest Day To Fly from Ontario, California to St Louis

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 St Louis is Tuesday. See the chart below to compare prices for other days of the week.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$439$388$388$414$439$396$414

Compare Flight Prices from Ontario, California to St Louis 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 St Louis flights.

Month Origin Destination Carrier Depart Date Return Date Stops Price
July Ontario, California St Louis American 7/24/19 7/30/19 1 $388
August Ontario, California St Louis American 8/6/19 8/13/19 1 $388
September Ontario, California St Louis American 9/10/19 9/14/19 1 $396
October Ontario, California St Louis American 10/1/19 10/8/19 1 $388
November Ontario, California St Louis American 11/25/19 12/3/19 1 $414
December Ontario, California St Louis American 12/27/19 1/4/20 1 $439
December Ontario, California St Louis American 12/31/19 1/7/20 1 $393
January Ontario, California St Louis American 1/18/20 1/25/20 1 $439

Cheap Last Minute Flights from Ontario, California to St Louis

Looking for cheap last minute flights or a weekend getaway? We've got you covered with weekend flight deals from Ontario, California to St Louis. 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
$1,094
7 8 9 10 11 12 13
$1,094 $615
14 15 16 17 18 19 20
$615 $451
21 22 23 24 25 26 27
$451 $461
28 29 30 31 1 2 3
$461 $439
4 5 6 7 8 9 10
$439

Connecting Flights vs Direct Flights from Ontario, California to St Louis

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 St Louis is $402.

The average price for direct flights from Ontario, California to St Louis is $512.

One Way Flights vs Round Trip Flights from Ontario, California to St Louis

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 St Louis. 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 St Louis is $250.

The average price for round trip flights from Ontario, California to St Louis is $402.

Ontario, California to St Louis 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 St Louis?
Answer: Seattle, WA

Airlines in Ontario, California flying to St Louis Last modified: Jul 4, 2019 2:34 -04:00Number of routes searched: 47Number of itineraries searched: 22,064

Wondering which airlines fly out of Ontario, California to St Louis? We've gathered the average price of Ontario, California airlines with flights to St Louis. 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 St Louis
Airline Connections Mon Tue Wed Thu Fri Sat Sun
Alaska -
American DFW
American PHX
Alaska SEA
Major Airlines ATL
Major Airlines SLC
Frontier DEN
United DEN
United IAH
United SFO

Ontario, California to St Louis Airports

These are the major commercial airports we're currently monitoring in Ontario, California and St Louis. 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 Domestic Flights from Ontario - ONT Last modified: Jul 4, 2019 2:34 -04:00

Cheap International Flights to St Louis - STL Last modified: Jul 4, 2019 2:34 -04:00

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Cheap Flights from Ontario, California to St Louis