Popular in | December |
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Cheapest in | October |
Round-trip from | $320 |
One-way from | $208 |
Leaving on a Friday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 120% on the overall cost on flights from Ontario to St. Louis.
Users have found that booking a flight from Ontario to St. Louis at least 48 days early can save you up to 146% on average compared to booking a flight this week. If booking 48 days before your flight isn’t an option for you, users have found flights from Ontario to St. Louis for as little as $462 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $677 for flights departing within the next 3 days.
The best pricing can be found in the month of January. Prices to St. Louis from Ontario average $416. You can even find prices in January for less than $416, as users have found deals to St. Louis from as low as $215. The month of July appears to be one of the more expensive times to travel to St. Louis from Ontario. Flying in the targeted month can save you up to 12%.
A simple way to save on the total cost of your ticket is to fly from Ontario to St. Louis in the evening. If you’re flexible enough to do this you can expect to save up to 44% on your trip compared to booking a flight at noon.
Fly from
Fly to
Budget
$127 - $439
Route
Depart
Return
Price
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Fri 5/31
1 stop14h 12m
Lambert-St Louis
Mon 6/3
1 stop5h 55m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Tue 5/21
1 stop6h 37m
Lambert-St Louis
Tue 5/28
1 stop27h 53m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Sun 5/19
1 stop8h 43m
Lambert-St Louis
Thu 5/30
1 stop26h 53m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Sat 6/1
1 stop10h 03m
Lambert-St Louis
Thu 6/6
1 stop10h 12m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Fri 5/31
1 stop19h 46m
Lambert-St Louis
Sun 6/2
1 stop26h 37m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Sun 5/19
1 stop14h 04m
Lambert-St Louis
Wed 5/22
1 stop12h 19m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Fri 7/5
2 stops11h 34m
Lambert-St Louis
Mon 7/8
1 stop5h 39m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Tue 8/6
1 stop5h 36m
Lambert-St Louis
Fri 8/9
1 stop6h 45m
OntarioLambert-St Louis
ONT - STL
ONTSTL
Ontario
Wed 7/3
1 stop7h 48m
Lambert-St Louis
Sat 7/6
2 stops10h 03m
Currently, September is the cheapest month in which you can book a flight from Ontario to St. Louis (average of $320). Flying from Ontario to St. Louis in July is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
January
$326
February
$331
March
$357
April
$337
May
$342
June
$366
July
$369
August
$336
September
$320
October
$324
November
$336
December
$326
STL Temperature | 32 - 80.6 °F |
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Boarding
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Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Boarding
Food
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Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
Boarding
Food
Crew
Comfort
Entertainment
Overall
Reviews
My original flight was delayed so they found this flight for me so I could arrive at a reasonable time
0%of flight departures | Early morningMidnight to 6 am |
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100%of flight departures | Morning6 am to noon |
0%of flight departures | AfternoonNoon to 6 pm |
0%of flight departures | Evening6 pm to midnight |
Cheapflights makes it easy to find Ontario to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Cheapflights helps you find that perfect flight to St. Louis from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Yes, we can. To see specific flights from Ontario to St. Louis with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Yes, Cheapflights offers price alerts on Ontario to St. Louis flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.