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Cheap Flights from St. Louis, MO (STL) to Ontario, CA (ONT)

Last minute flights from St. Louis, MO to Ontario, CA

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Prices shown below were available within the past 3 days for the period specified and should not be considered the final price offered. Please note that availability and prices are subject to change.

St. Louis, MO Ontario, CA

BEST

DEAL

Wed, 13 Nov STL - ONT

Fri, 15 Nov ONT - STL

$619 $600

Prime price per passenger

St. Louis, MO Ontario, CA

BEST

DEAL

Sun, 08 Dec STL - ONT

-22 %

$49 $38

Prime price per passenger

St. Louis, MO Ontario, CA

BEST

DEAL

Sun, 17 Nov STL - ONT

Thu, 05 Dec ONT - STL

$110 $107

Prime price per passenger

St. Louis, MO Ontario, CA

BEST

DEAL

Sat, 23 Nov STL - ONT

Sun, 24 Nov ONT - STL

$188 $182

Prime price per passenger

St. Louis, MO Ontario, CA

BEST

DEAL

Thu, 28 Nov STL - ONT

Mon, 02 Dec ONT - STL

$909 $890

Prime price per passenger

St. Louis, MO Ontario, CA

BEST

DEAL

Sun, 01 Dec STL - ONT

Fri, 17 Jan ONT - STL

$319 $309

Prime price per passenger

Route information

Distance: 1554 miles

St. Louis, MO airports

Lambert-St Louis Internatl (STL) How far from city center: 12 miles

Ontario, CA airports

Ontario International (ONT) How far from city center: 2 miles

Are you searching for flights from St. Louis, MO to Ontario, CA?

Are you planning to travel to Ontario, CA for vacations, business or family visits? eDreams offers you the cheapest flights and best deals departing from St. Louis, MO. With our fast search engine you will get a large selection of airfares from standard and low cost airlines worldwide and easily book your tickets for this route. If you are flexible we help you identify the cheapest day to fly to Ontario, CA and if you need to leave soon you can check our most convenient last minute fares. Read all the useful information about your next destination and proceed to the reservation, indicating your flight dates and completing your travel booking with hotels and car rental!

Frequently asked questions about flights from St. Louis, MO to Ontario, CA

What are the benefits of booking flexible flight tickets?

Using the flexible flight ticket, you're guaranteed a refund or a rebooking option (without fees) in case of flight cancellations when travelling to United States. At eDreams have you covered!

For flights from St. Louis, MO to Ontario, CA, how can I find the cheapest price?

The cheapest price for a flight from St. Louis, MO to Ontario, CA is $38. At eDreams we use different machine learned based methodologies to find our costumers the best option available, considering airline combinations, stopovers and direct flights as well as different criteria for inbound and outbound journeys.

When booking, when is the best time to get the best prices for flights from St. Louis, MO to Ontario, CA?

The most popular months to book a trip from St. Louis, MO to Ontario, CA are December, May and April, based on the searches of our customers.

When is the best time to travel from St. Louis, MO to Ontario, CA?

The best time of the year to visit Ontario, CA depends on lots of personal preferences, especially the price. Regarding popularity, December is the best month to fly to Ontario, CA from St. Louis, MO in terms of searches from our customers, followed by June and May. If you prefer to avoid the busy season and get away from the crowds August, January and February are the months with fewer searches for St. Louis, MO - Ontario, CA.

How is the weather in Ontario, CA compared to St. Louis, MO?

While in St. Louis, MO the temperatures can reach an average of 34.91 ºC in summer, with precipitation levels up to 12.0 mm ,Ontario, CA's temperatures can go up to 36.7 ºC during the hot season, with 1.4 mm average of rain rate . In winter, however, weather indicators show around -0.46 ºC in Ontario, CA, compared to the -13.87 ºC average degrees reported in St. Louis, MO. During the winter period, St. Louis, MO can register 6.0 mm precipitation, while Ontario, CA have an average of 3.0 mm rain level.

Cheapest flight $38 The best price for flights from St. Louis, MO to Ontario, CA offered by eDreams, which have been found by our customers in the last 3 days

Departure Airport Lambert-St Louis Internatl Lambert-St Louis Internatl is where you'll take off when flying from St. Louis, MO to Ontario, CA

Arrival Airport Ontario International You'll land at Ontario International when flying from St. Louis, MO to Ontario, CA

Peak season December December is the busiest time to fly from St. Louis, MO to Ontario, CA according to search data results from our customers