Flight information for St. Louis to Ontario
(STL to ONT)
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Ontario
| Best Price Found | $158 | The best flight deal from St. Louis to Ontario found on momondo in the last 72 hours is $158 |
| Fastest flight time | 5h 49m | The fastest flight from St. Louis to Ontario takes 5h 49m |
| Direct flights | None | There are no direct flights from St. Louis to Ontario. Popular non-direct route for this connection is Lambert-St Louis Airport - Ontario Airport. |
| Airports in Ontario | 1 airport | There is 1 airport near Ontario: Ontario (ONT) |
How to get the cheapest flight ticket from St. Louis to Ontario
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly from St. Louis to Ontario?
August
The cheapest time of year to fly to Ontario from St. Louis is August. Most expensive is December
What is the cheapest day to depart St. Louis for Ontario?
Tuesday
The cheapest day of the week is typically Tuesday. The most expensive is typically Sunday
When is the cheapest time to fly from St. Louis to Ontario?
in the morning
St. Louis to Ontario flights are approximately 24% more expensive in the afternoon than in the morning
What is the cheapest airline that flies to Ontario from St. Louis?
Frontier
American Airlines, Delta, and Frontier are the most popular carriers operating from St. Louis to Ontario
What is the cheapest St. Louis to Ontario flight route?
Lambert-St Louis - Ontario
Fly from Lambert-St Louis to Ontario for the best St. Louis - Ontario flight prices
How far in advance should you book St. Louis to Ontario flights?
42 days before
The cheapest time to buy a flight from St. Louis to Ontario is approximately 42 days to departure
Easily compare round-trip flights from St. Louis to Ontario
Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from St. Louis to Ontario by changing tabs
Find the cheapest one-way flights from St. Louis to Ontario
If you're looking for one-way flights from St. Louis to Ontario, view some of our deals below provided by American Airlines and Frontier
Search last-minute flights to Ontario from St. Louis
Find and compare flight prices for your last-minute flight from St. Louis to Ontario
Best airlines flying from St. Louis to Ontario
Compare and see reviews for airlines that fly from St. Louis to Ontario with momondo
Reviews
I tried to check in at the kiosk, this should have been fast because I prepaid for my carry on and wasn’t checking a bag. The kiosk said I needed to get in line to check in and it was a long line. Once I got to an agent, 35 minutes before my plane was to leave, he said I missed checkin and would have to be rescheduled. This new flight was 4 hours longer and then he forgot to return my passport to me, luckily he found me on the way to the restroom. I will do my best not to fly Frontier again.
Reviews
Basic economy experience needs to be at least on par with other airlines. Gate agent was rude and singled us out to step aside. Bags were lost despite paying for then, and claim agent told me it was because I was basic economy.
Reviews
Flight attendant for first class is definitely not a morning person. Oh and the WiFi DID NOT WORK!
Reviews
Great
Are airlines flying from Lambert-St Louis to Ontario offering flexible cancellation due to COVID-19?
Due to the global impact of COVID-19, some of our airline partners operating flights from Lambert-St Louis to Ontario, such as American Airlines, Frontier, and United Airlines may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.
How far is Lambert-St Louis to Ontario by plane?
A flight from Lambert-St Louis to Ontario will travel around 1552.8 mi. 5h 45m is a normal flight duration for this route.
Can I fly to Ontario from Lambert-St Louis right now?
Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter Ontario.
COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Ontario.
Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Ontario.
Can I fly back to Lambert-St Louis from Ontario?
COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Lambert-St Louis.
Quarantine requirements
Visitors from Ontario are not required to quarantine after entering Lambert-St Louis.