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Did you mean flights from St Louis to Ontario?

Cheap Flights from Ontario to St Louis, MO, United States - ONT to STL Last modified: Jul 25, 2016 1:33 AM

Popular flights from Ontario to St Louis Last modified: Jul 25, 2016 1:33 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.

American
ONTSTL
Tue 8/23
1 stop
STLONT
Wed 8/31
1 stop
$314
Select
American
ONTSTL
Thu 8/25
1 stop
STLONT
Sat 9/3
1 stop
$314
Select
American
ONTSTL
Sat 8/27
1 stop
STLONT
Tue 8/30
1 stop
$314
Select
American
ONTSTL
Sat 8/27
1 stop
STLONT
Sat 9/3
1 stop
$314
Select
American
ONTSTL
Thu 9/1
1 stop
STLONT
Thu 9/8
1 stop
$314
Select
United
ONTSTL
Mon 9/19
1 stop
STLONT
Tue 9/27
1 stop
$314
Select
United
ONTSTL
Wed 9/21
1 stop
STLONT
Wed 9/28
1 stop
$314
Select
United
ONTSTL
Wed 9/28
1 stop
STLONT
Tue 10/4
1 stop
$314
Select
United
ONTSTL
Mon 11/7
1 stop
STLONT
Mon 11/14
1 stop
$314
Select
United
ONTSTL
Tue 11/15
1 stop
STLONT
Thu 11/24
1 stop
$314
Select

How Much Does it Cost to Fly from Ontario to St Louis (ONT to STL)?

We have collected flight cost data from across the web for travel from Ontario to St Louis, and have found the average flight price for this trip to be $338.

When Can I Buy the Cheapest Flight from Ontario to St Louis (ONT to STL)?

Airlines can adjust prices for plane tickets from Ontario 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 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.

Cheapest Day To Fly from Ontario to St Louis

The chart below shows up-to-date information regarding the cheapest days to fly from Ontario to St Louis.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$314 $314 $314 $314 $369 $314 $424

Lowest Fares Chart By Month from Ontario to St Louis

The chart below shows the lowest fare by month when flying from Ontario to St Louis.

Month Origin Destination Carrier Depart Date Return Date Stops Price
July Ontario St Louis United 7/31/16 8/9/16 1 $555
August Ontario St Louis American 8/23/16 8/31/16 1 $314
September Ontario St Louis American 9/1/16 9/4/16 1 $314
October Ontario St Louis American 10/12/16 10/19/16 1 $314
November Ontario St Louis American 11/7/16 11/14/16 1 $314
December Ontario St Louis American 12/18/16 12/26/16 1 $547
January Ontario St Louis United 1/17/17 1/25/17 1 $314
March Ontario St Louis United 3/10/17 3/20/17 1 $477

Airports for Your Route

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

Cheap Domestic Flights from Ontario - ONT

FlightsAirlineLowest Price
Ontario to Chicago American, Alaska, United $174

Cheap Domestic Flights to St Louis - STL

FlightsAirlineLowest Price
Los Angeles to St Louis American, Alaska, JetBlue, Frontier, United $244
San Diego to St Louis American, Alaska, Frontier, United $244
Las Vegas to St Louis American, Alaska, Frontier, United $97
Santa Ana to St Louis American, Alaska, United $297
Long Beach to St Louis American, Alaska, United $314
Palm Springs to St Louis American, Alaska, United $354
Santa Barbara to St Louis American, Alaska, United $354
Burbank to St Louis American, United $314
Bakersfield to St Louis American, United $354
San Diego to Chicago American, Alaska, Frontier, Spirit, United, Virgin America $81
Las Vegas to Chicago American, Alaska, Frontier, Spirit, United, Virgin America $137
Las Vegas to New York American, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America $264
Los Angeles to Houston American, Alaska, Frontier, Spirit, United $187
San Diego to Atlanta American, Alaska, Frontier, Spirit, United $325
Los Angeles to Detroit American, Alaska, JetBlue, Frontier, Spirit, United $227
Santa Ana to Chicago American, Alaska, Frontier, United $157
Los Angeles to Nashville American, Alaska, JetBlue, United $191
San Diego to Dallas - Ft Worth American, Alaska, Frontier, Spirit, United, Virgin America $81
Los Angeles to Indianapolis American, Alaska, Frontier, United $244
Las Vegas to Atlanta American, Alaska, Frontier, Spirit, United $137
Los Angeles to Minneapolis - St Paul American, Alaska, Frontier, Spirit, Sun Country, United $157
Las Vegas to Dallas - Ft Worth American, Alaska, Frontier, Spirit, United, Virgin America $81
Los Angeles to Kansas City American, Alaska, Frontier, Spirit, United $157
Los Angeles to Memphis American, Alaska, Frontier, United $299
Los Angeles to Orlando American, Alaska, JetBlue, Frontier, Hawaiian, Spirit, Sun Country, United, Virgin America $177
Los Angeles to Charlotte American, Alaska, JetBlue, Frontier, United $236
Las Vegas to Los Angeles American, Spirit, United, Virgin America $77
Los Angeles to Phoenix American, Alaska, Spirit, United, Great Lakes $71

Cheap International Flights to St Louis - STL

FlightsAirlineLowest Price
Los Angeles to Toronto American, Air Canada, Alaska, JetBlue, Frontier, Sun Country, United, Virgin America, WestJet $428
Cheap Flights from Ontario to St Louis, MO, United States, from $314 Round trip from ONT to STL