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St. Louis Lambert International Airport to Ontario International Airport flight
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Cheap Flights from St. Louis Lambert International Airport to Ontario International Airport

Search for flights from St. Louis to Los Angeles. Find affordable one-way or round-trip flights.

  • One way
  • Round-trip
sortSort by: Lowest Price
  • Sort by: Lowest Price
  • Sort by: Earliest Flight
      • STL20:04
        5h 55m
        Direct
        ONT23:59
        St. Louis - Ontario|Sat, May 18|Frontier Airlines
        SGD 37SGD 96
        61% OFF
        61% OFF
        SGD 96SGD 37
      • STL19:23
        14h 1m
        1 stop
        ONT07:24
        St. Louis - Ontario|Wed, May 22|Frontier Airlines
        SGD 54SGD 96
        44% OFF
        44% OFF
        SGD 96SGD 54
      • STL19:23
        15h 41m
        1 stop
        ONT09:04
        St. Louis - Ontario|Tue, May 28|Frontier Airlines
        SGD 65SGD 96
        32% OFF
        32% OFF
        SGD 96SGD 65
      • STL20:04
        5h 55m
        Direct
        ONT23:59
        St. Louis - Ontario|Mon, May 20|Frontier Airlines
        SGD 67
        SGD 67
      • STL19:23
        15h 41m
        1 stop
        ONT09:04
        St. Louis - Ontario|Mon, Jun 3|Frontier Airlines
        SGD 68
        SGD 68
      • STL19:23
        25h
        1 stop
        ONT18:23
        St. Louis - Ontario|Thu, May 23|Frontier Airlines
        SGD 71
        SGD 71
      • STL22:44
        16h 50m
        1 stop
        ONT13:34
        St. Louis - Ontario|Tue, May 21|Frontier Airlines
        SGD 71
        SGD 71
      • STL19:23
        16h 6m
        1 stop
        ONT09:29
        St. Louis - Ontario|Tue, Jun 4|Frontier Airlines
        SGD 71
        SGD 71
      • STL15:47
        10h 12m
        1 stop
        ONT23:59
        St. Louis - Ontario|Tue, Jun 11|Frontier Airlines
        SGD 78
        SGD 78
      • STL19:29
        13h 34m
        1 stop
        ONT07:03
        St. Louis - Ontario|Wed, Jun 5|Frontier Airlines
        SGD 84
        SGD 84
      • STL13:00
        3h 5m
        Direct
        ONT14:00
        St. Louis - Los Angeles|Sat, May 25|Frontier Airlines
        Find More Flights
        Find More Flights

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

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

View airlines operating flights from St. Louis to Los Angeles. Compare prices and find the airline that meets your travel needs to enjoy a comfortable journey.

Frontier Airlines
From SGD 37
Spirit Airlines
From SGD 86
American Airlines
From SGD 130
Delta Air Lines
From SGD 166
Sun Country Airlines
From SGD 181
United Airlines
From SGD 200
Alaska Airlines
From SGD 234
Southwest Airlines
From SGD 268
ANA airlines
Find more flights and airlines

Find Cheaper Flights from St. Louis to Los Angeles

Explore other flights from St. Louis to Los Angeles. Find the best alternative flight.

  • Cheapest
    Spirit Airlines
    STL
    11:36
    12h 16m
    1 transfer
    LAX
    21:52
    St. Louis Lambert International Airport - Los Angeles International Airport
    Wed, May 29Spirit Airlines
    SGD 55
  • Spirit Airlines
    STL
    11:36
    12h 16m
    1 transfer
    LAX
    21:52
    St. Louis Lambert International Airport - Los Angeles International Airport
    Wed, May 29Spirit Airlines
    SGD 55
    Find More Flights

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

Flight distance2,485.2km
Cheapest one-way ticket priceSGD 37
Cheapest return ticket priceSGD 139

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

  • How long is a flight from St. Louis Lambert International Airport to Ontario International Airport?

    It takes around 5 hours 55 minutes to fly from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT).

  • How many daily flights are there from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT)?

    There are around 1 daily flights from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT).

  • When are flight tickets from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) the cheapest?

    Tickets cost around SGD 298 in May, making it the cheapest month to book. St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) is a popular route, so don't forget to book your tickets in advance.

  • When are flight tickets from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) most expensive?

    The route from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) is quite popular. Without considering departure times or holidays, tickets cost around SGD 298 in May, the most expensive month to book this route.

  • What time does the earliest flight from St. Louis Lambert International Airport to Ontario International Airport depart?

    The earliest flight departs from St. Louis Lambert International Airport (STL) at 05:25 and arrives in Ontario International Airport (ONT) at 08:30.

  • What time does the latest flight from St. Louis Lambert International Airport to Ontario International Airport depart?

    The latest flight departs from St. Louis Lambert International Airport (STL) at 20:04 and arrives in Ontario International Airport (ONT) at 23:59.

  • What is the transportation method from the main airport to downtown in Los Angeles?

    • The distance from Los Angeles International Airport to downtown is about 19km. It takes about 30 minutes by taxi.
    • The distance from Ontario International Airport to downtown is about 59km. It takes about 1 hour 10 minutes by taxi.

  • What's the closest airport to Ontario International Airport (ONT)?

    The closest airport to Ontario International Airport (ONT) is Chino Airport. The distance is around 9km.

  • Which airline operates the most direct flights from St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT)?

    Frontier Airlines is a very popular airline operating an average of 176 flights per month.

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