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Cheap Flight Deals from Ontario International Airport to St. Louis Lambert International Airport

Search for flights from Los Angeles to St. Louis and check out affordable one-way and round-trip options.

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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Selected Airlines from Ontario International Airport to St. Louis Lambert International Airport

See which airlines fly from Los Angeles to St. Louis. Find the airline that best meets your travel needs by comparing prices and treat yourself to an enjoyable journey.

Frontier Airlines
From AU$ 66
Southwest Airlines
From AU$ 192
Delta Air Lines
From AU$ 207
United Airlines
From AU$ 214
Alaska Airlines
From AU$ 273
American Airlines
From AU$ 397
ANA airlines
Find more flights and airlines

Find Cheaper Flights from Los Angeles to St. Louis

Explore other flights from Los Angeles to St. Louis to find the best alternative options.

  • Cheapest
    Frontier Airlines
    LAX
    21:33
    10h 45m
    1 transfer
    STL
    10:18
    Los Angeles International Airport - St. Louis Lambert International Airport
    Tue, Apr 23Frontier Airlines
    AU$ 83
  • Frontier Airlines
    LAX
    21:33
    10h 45m
    1 transfer
    STL
    10:18
    Los Angeles International Airport - St. Louis Lambert International Airport
    Tue, Apr 23Frontier Airlines
    AU$ 83
    Find More Flights

Ontario International Airport to St. Louis Lambert International Airport Flights Info

Flight distance2,485.2km
Cheapest one-way ticket priceAU$ 65
Cheapest return ticket priceAU$ 115

FAQs for Ontario International Airport to St. Louis Lambert International Airport Flights

  • How long is the flights from Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL)?

    It takes around 5 hours 15 minutes to fly from Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL).
  • How many daily flights are there from Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL)?

    There are around 1 daily flights from Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL).
  • When are flight from Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL) the cheapest?

    Tickets cost around AU$ 491 in May, making it the cheapest month to book. Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL) is a popular route, so don't forget to book your tickets in advance.
  • When are flight from Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL) most expensive?

    The route from Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL) is quite popular. Without considering departure times or holidays, tickets cost around AU$ 491 in May, the most expensive month to book this route.
  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20km, by taxi about 40 minutes.
  • Which airline operates the most direct flights from Ontario International Airport (ONT) to St. Louis Lambert International Airport (STL)?

    Southwest Airlines is a very popular airline operating an average of 24 flights per month.