Most accurate provider | Mytrip 3 stars |
---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $178 (Frontier) |
One-way from | $85 (Trip.com) |
Popular in | March |
Cheapest in | February |
Average price | $320 |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Sat 5/3
8:15 pm-11:59 pm
1 stop5h 44m
Ontario
Fri 5/9
12:59 am-9:59 am
1 stop7h 00m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Wed 5/14
7:30 am-12:15 pm
1 stop6h 45m
Ontario
Wed 5/21
10:01 am-6:24 pm
1 stop6h 23m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Sat 6/7
5:20 am-12:14 pm
2 stops8h 54m
Ontario
Wed 6/11
6:41 pm-5:03 am
1 stop8h 22m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Sat 6/7
3:08 pm-9:38 pm
2 stops8h 30m
Ontario
Wed 6/11
12:55 pm-11:54 pm
2 stops8h 59m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Fri 5/16
9:55 pm-7:24 am
1 stop11h 29m
Ontario
Sat 5/24
10:00 am-12:04 am
2 stops12h 04m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Fri 5/16
3:03 pm-10:46 pm
1 stop9h 43m
Ontario
Wed 5/21
11:51 am-12:04 am
1 stop10h 13m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Mon 5/12
5:20 am-11:00 am
2 stops7h 40m
Ontario
Thu 5/22
2:55 pm-12:35 am
1 stop7h 40m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Mon 5/5
3:08 pm-11:59 pm
1 stop10h 51m
Ontario
Sat 5/10
11:46 am-11:59 pm
1 stop10h 13m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Mon 5/12
9:55 pm-12:08 pm
1 stop16h 13m
St. LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Sat 6/21
7:15 am-12:17 pm
1 stop7h 02m
Provider | Price Accuracy | Trust Score* |
---|---|---|
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*2 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars |
The price you pay for your flight from St. Louis to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 66 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, August is the cheapest month in which you can book a flight from St. Louis to Ontario (average of $246). Flying from St. Louis to Ontario in March is currently the most expensive (average of $328). 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.
It’s optimal to fly from St. Louis to Ontario in the afternoon. By choosing this option you can save up to 19% on the cost of your flight, compared to a flight in the morning.
Travelers seeking maximum savings on their St. Louis to Ontario flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.
If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).
Food
Entertainment
Boarding
Comfort
Crew
Overall
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Entertainment
Boarding
Comfort
Crew
Overall
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Entertainment
Boarding
Comfort
Crew
Overall
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Entertainment
Boarding
Comfort
Crew
Overall
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Entertainment
Boarding
Comfort
Crew
Overall
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Entertainment
Boarding
Comfort
Crew
Overall
Reviews
Anonymous,Apr 2025
LAS - STS
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$128 | Average$230 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$181 | Average$362 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$281 | Average$414 | FlexibilityNo cancel fee | On-time71% | |
Cheapest$326 | Average$417 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$341 | Average$412 | FlexibilityNo cancel fee | On-time63% |