Cheap flights from Ontario to St Louis (ONT - STL)

Flight FAQs

From Ontario to St Louis

Are flight prices decreasing from Ontario to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Ontario and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Ontario to Lambert-St Louis to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Delta is one of them. Some of the new policies that have been implemented to accommodate travelers flying from Ontario to Lambert-St Louis are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

Which airlines flying from Ontario to Lambert-St Louis have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Ontario to Lambert-St Louis that may be offering flexible cancellation policies are American Airlines, Frontier, and United Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from Ontario to St Louis for under $200 on Cheapflights?

Yes, there are multiple flights from Ontario to St Louis for under $200. The cheapest flight booked recently is on Frontier for just $174, but on average you can expect to pay $323.

Are there nonstop flights from Ontario to St Louis for under $200 on Cheapflights?

There are no nonstop flights from Ontario to St Louis, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from Ontario to St Louis for under $400?

There are currently 2+ open flights from Ontario to St Louis within the next 7 days for less than $400.

How popular is this flight route?

This flight path from Ontario to Lambert-St Louis was viewed by 283 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

Does it rain more in Ontario or St Louis?

In Ontario, there will be less rainfall in Ontario compared to St Louis over the next 4 days.

Is Ontario weather warmer or cooler than St Louis?

We forecast the temperature to be around the 95 °F's in July, on average. The temperature in St Louis is generally colder than in Ontario. Book flights in a timely manner in correlation to your departure date.

How long is the flight from Ontario to St Louis?

United Airlines, American Airlines, and Delta can get you from Ontario to St Louis in just under 5h 03m. Your travel time can differ by up to 3h 11m. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Ontario to St Louis round-trip?

According to our current data, Frontier ($174), Delta ($266), and United Airlines ($286) offers the cheapest pricing from Ontario to St Louis. Users have found that Frontier is 47% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Ontario to St Louis one-way?

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $65. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Ontario to St Louis for a low price.