Flight information for Ontario to St. Louis
(ONT to STL)
Find info about flight duration, direct flights, and airports for your flight from Ontario to St. Louis
| Best Price Found | $167 | The best flight deal from Ontario to St. Louis found on momondo in the last 72 hours is $167 |
| Fastest flight time | 5h 17m | The fastest flight from Ontario to St. Louis takes 5h 17m |
| Direct flights | None | There are no direct flights from Ontario to St. Louis. Popular non-direct route for this connection is Ontario Airport - Lambert-St Louis Airport. |
| Airports in St. Louis | 1 airport | There is 1 airport near St. Louis: Lambert-St Louis (STL) |
How to get the cheapest flight ticket from Ontario to St. Louis
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 Ontario to St. Louis?
September
The cheapest time of year to fly to St. Louis from Ontario is September. Most expensive is December
What is the cheapest day to depart Ontario for St. Louis?
Tuesday
The cheapest day of the week is typically Tuesday. The most expensive is typically Friday
When is the cheapest time to fly from Ontario to St. Louis?
in the afternoon
Ontario to St. Louis flights are approximately 46% more expensive in the morning than in the afternoon
What is the cheapest airline that flies to St. Louis from Ontario?
Frontier
American Airlines, Delta, and Frontier are the most popular carriers operating from Ontario to St. Louis
What is the cheapest Ontario to St. Louis flight route?
Ontario - Lambert-St Louis
Fly from Ontario to Lambert-St Louis for the best Ontario - St. Louis flight prices
How far in advance should you book Ontario to St. Louis flights?
40 days before
The cheapest time to buy a flight from Ontario to St. Louis is approximately 40 days to departure
Easily compare round-trip flights from Ontario to St. Louis
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 Ontario to St. Louis by changing tabs
Find the cheapest one-way flights from Ontario to St. Louis
If you're looking for one-way flights from Ontario to St. Louis, view some of our deals below provided by American Airlines, Frontier and United Airlines
Search last-minute flights to St. Louis from Ontario
Find and compare flight prices for your last-minute flight from Ontario to St. Louis
Best airlines flying from Ontario to St. Louis
Compare and see reviews for airlines that fly from Ontario to St. Louis with momondo
Reviews
Las azafatas NO eran amables. No te dan ni agua. Para todo hay que pagar. Los asientos super duros y no reclinaban. Pesimo!!
Reviews
Great
Reviews
Not because the flight is going to Africa we can’t get better service on board
Reviews
Flight attendant for first class is definitely not a morning person. Oh and the WiFi DID NOT WORK!
Are airlines flying from Ontario to Lambert-St Louis offering flexible cancellation due to COVID-19?
Some of our partner airlines flying from Ontario to Lambert-St Louis are adopting new policies due to the global impact of COVID-19. Some of the airlines that may be waiving their cancellation fees are American Airlines, Frontier, and United Airlines. You can search for the full list of airlines like American Airlines that are offering this flexibility.
How far is Ontario to Lambert-St Louis by plane?
There are 1552.8 mi between Ontario and Lambert-St Louis. 5h 17m is a normal flight duration for this route.
Can I fly to Lambert-St Louis from Ontario right now?
Most visitors from Ontario need to provide a negative COVID-19 test result and/or quarantine to enter Lambert-St Louis.
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.
Can I fly back to Ontario from Lambert-St Louis?
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.