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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: Aug 26, 2016 1:29 AM

Popular flights from Ontario to St Louis Last modified: Aug 26, 2016 1:29 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 9/13
1 stop
STLONT
Sat 9/17
1 stop
$314
Select
American
ONTSTL
Thu 9/15
1 stop
STLONT
Mon 9/19
1 stop
$314
Select
American
ONTSTL
Thu 9/15
1 stop
STLONT
Tue 9/20
1 stop
$314
Select
American
ONTSTL
Sat 9/17
1 stop
STLONT
Sat 9/24
1 stop
$314
Select
American
ONTSTL
Wed 9/21
1 stop
STLONT
Thu 9/29
1 stop
$314
Select
United
ONTSTL
Wed 11/9
1 stop
STLONT
Mon 11/14
1 stop
$324
Select
United
ONTSTL
Wed 12/7
1 stop
STLONT
Sun 12/11
1 stop
$324
Select
Alaska
ONTSTL
Wed 12/21
nonstop
STLONT
Wed 1/4
nonstop
$359
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 $336.

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
$419 $314 $314 $314 $324 $314 $349

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
August Ontario St Louis American 8/30/16 9/4/16 1 $916
September Ontario St Louis American 9/13/16 9/17/16 1 $314
October Ontario St Louis American 10/28/16 10/30/16 1 $334
November Ontario St Louis American 11/9/16 11/14/16 1 $314
December Ontario St Louis United 12/7/16 12/11/16 1 $324
February Ontario St Louis United 2/15/17 2/22/17 1 $314
March Ontario St Louis United 3/7/17 3/11/17 1 $422
July Ontario St Louis American 7/13/17 7/16/17 1 $480
TIPSave $204 by flying into Evansville instead of St Louis from Ontario

Ontario 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 to St Louis?
Answer: Denver, CO

Airlines Flying from Ontario to St Louis (ONT to STL) Number of flights searched: 152Last modified: Aug 26, 2016 1:29 AM

Below are the different airlines that fly from Ontario to St Louis 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 Ontario to St Louis.

Ontario to St Louis
Airline Connections Mon Tue Wed Thu Fri Sat Sun
American PHX X X X X X X X
American PHX / ORD X X X X X X X
Alaska SEA X X X X X X X
Delta SLC X X X X X X X
Delta SLC / ATL X X X X X X X
United SFO X X X X X X X
Southwest DEN X X X X X X X

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, Delta, United $184

Cheap Domestic Flights to St Louis - STL

FlightsAirlineLowest Price
Los Angeles to St Louis American, Alaska, Delta, Frontier, United $219
San Diego to St Louis American, Alaska, Delta, Frontier, United $234
Las Vegas to St Louis American, Alaska, Delta, Frontier, United $107
Santa Ana to St Louis American, Alaska, Delta, United $303
Long Beach to St Louis American, Delta $307
Palm Springs to St Louis American, Alaska, Delta, United $354
Santa Barbara to St Louis American, Alaska, United $354
Burbank to St Louis American, Delta, United $297
Bakersfield to St Louis American, United $364
San Diego to Chicago American, Alaska, Delta, Frontier, Spirit, United, Virgin America $117
Las Vegas to Chicago American, Alaska, Delta, Frontier, Spirit, United, Virgin America $87
Las Vegas to New York American, Alaska, JetBlue, Delta, Frontier, Spirit, Sun Country, United, Virgin America $224
Los Angeles to Houston American, Alaska, Delta, Frontier, Spirit, United $80
San Diego to Atlanta American, Alaska, Delta, Frontier, Spirit, United $288
Los Angeles to Detroit American, Alaska, JetBlue, Delta, Frontier, Spirit, United $205
Santa Ana to Chicago American, Alaska, Delta, Frontier, United $127
Los Angeles to Nashville American, Alaska, JetBlue, Delta, Frontier, United $209
San Diego to Dallas - Ft Worth American, Alaska, Delta, Frontier, Spirit, United, Virgin America $81
Los Angeles to Indianapolis American, Alaska, Delta, Frontier, United $214
Las Vegas to Atlanta American, Alaska, Delta, Frontier, Spirit, United $112
Los Angeles to Minneapolis - St Paul American, Alaska, Delta, Frontier, Spirit, Sun Country, United $135
Las Vegas to Dallas - Ft Worth American, Alaska, Delta, Frontier, Spirit, United, Virgin America $81
Los Angeles to Kansas City American, Alaska, Delta, Frontier, Spirit, United $127
Los Angeles to Memphis American, Alaska, Delta, Frontier, United $239
Los Angeles to Orlando American, Alaska, JetBlue, Delta, Frontier, Spirit, Sun Country, United, Virgin America $175
Los Angeles to Charlotte American, Alaska, JetBlue, Delta, Frontier, United $236
Las Vegas to Los Angeles American, Delta, Spirit, United, Virgin America $77
Los Angeles to Phoenix American, Alaska, Delta, Spirit, United, Great Lakes $70

Cheap International Flights to St Louis - STL

FlightsAirlineLowest Price
Los Angeles to Toronto American, Air Canada, AeroMexico, Alaska, Avianca, Copa, Delta, United, WestJet $246
Cheap Flights from Ontario to St Louis, MO, United States, from $314 Round trip from ONT to STL