Flights
Hotels
From
To
1 traveler
Unsupported Browser!
Find Flights
Flights
Hotels
1 traveler
Unsupported Browser!
Find Flights

Cheap Flights from Ontario to St Louis, MO, United States - ONT to STL

Popular flights from Ontario to St Louis

If your flight days are flexible and you looking for a good deal, our charts on cheap flights provide some insight regarding affordable flight options for your next big adventure.

American Airlines
Departure Date Return Date Lowest Price
Apr 22, 2016 Apr 24, 2016 $299
United Airlines
Departure Date Return Date Lowest Price
Apr 22, 2016 Apr 24, 2016 $307

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 $308.

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
$312 $311 $300 $312 $299 $311 $313

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
February Ontario St Louis American 2/19/16 2/27/16 1 $413
March Ontario St Louis American 3/1/16 3/9/16 1 $311
April Ontario St Louis American 4/22/16 4/24/16 0 $299
May Ontario St Louis United 5/14/16 5/16/16 1 $310
June Ontario St Louis American 6/4/16 6/12/16 1 $427
July Ontario St Louis American 7/6/16 7/9/16 1 $435
August Ontario St Louis American 8/13/16 8/27/16 1 $471
September Ontario St Louis American 9/7/16 9/13/16 1 $471

Round Trip vs One Way Flights from Ontario to St Louis (ONT to STL)

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 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 to St Louis is $157.

The average price for round trip flights from Ontario to St Louis is $305.

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)

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
Delta SLC X X X X X X X
Delta SLC / DTW X X X X X X X
United IAH X X X X X X X
Southwest PHX 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, United $172

Cheap Domestic Flights to St Louis - STL

FlightsAirlineLowest Price
Los Angeles to St Louis American, Alaska, Frontier, United $218
San Diego to St Louis American, Alaska, United $253
Las Vegas to St Louis American, Alaska, Frontier, United $108
Santa Ana to St Louis American, Alaska, United $302
Long Beach to St Louis American, United $342
Palm Springs to St Louis American, Alaska, United $324
Santa Barbara to St Louis American, Alaska, United $452
Burbank to St Louis American, United $314
Bakersfield to St Louis American, United $445
San Diego to Chicago American, Alaska, Spirit, United, Virgin America $87
Las Vegas to Chicago American, Alaska, Frontier, Spirit, United, Virgin America $136
Las Vegas to New York American, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America $232
Los Angeles to Houston American, Alaska, Frontier, Spirit, United $104
San Diego to Atlanta American, Alaska, Frontier, Spirit, United $333
Los Angeles to Detroit American, Alaska, JetBlue, Frontier, Spirit, United $210
Santa Ana to Chicago American, Alaska, Frontier, United $185
Los Angeles to Nashville American, Alaska, Frontier, United $190
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, JetBlue, Frontier, Spirit, United $117
Los Angeles to Minneapolis - St Paul American, Alaska, Frontier, Spirit, Sun Country, United $171
Las Vegas to Dallas - Ft Worth American, Alaska, Frontier, Spirit, United, Virgin America $78
Los Angeles to Kansas City American, Alaska, Frontier, Spirit, United $117
Los Angeles to Memphis American, Alaska, United $190
Los Angeles to Orlando American, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America $187
Los Angeles to Charlotte American, Alaska, JetBlue, Frontier, United $247
Las Vegas to Los Angeles American, Spirit, United, Virgin America $77
Los Angeles to Phoenix American, Alaska, Spirit, United, Great Lakes $79

Cheap International Flights to St Louis - STL

FlightsAirlineLowest Price
Los Angeles to Toronto American, Air Canada, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America, Sunwing, WestJet $281
Cheap Flights from Ontario to St Louis, MO, United States, from $299 Round trip from ONT to STL