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Cheap flight deals from Ontario to St. Louis Starting at AED 167

Discover our range of affordable one-way and round-trip flights from Ontario to St. Louis and kick-start your next adventure today!

  • One way
  • Round-trip
      • ONT00:59
        6h 17m
        1 stop
        STL09:16
        Sat, Feb 22|Ontario - St. Louis|Frontier Airlines
        AED 167AED 275
        39% OFF
        39% OFF
        AED 275AED 167

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Sat, Feb 22, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 167 including taxes and charges.

      • ONT00:59
        7h 2m
        1 stop
        STL10:01
        Wed, Apr 23|Ontario - St. Louis|Frontier Airlines
        AED 169AED 275
        38% OFF
        38% OFF
        AED 275AED 169

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Wed, Apr 23, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 169 including taxes and charges.

      • ONT00:59
        6h 7m
        1 stop
        STL09:06
        Mon, Apr 7|Ontario - St. Louis|Frontier Airlines
        AED 170AED 275
        38% OFF
        38% OFF
        AED 275AED 170

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Mon, Apr 7, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 170 including taxes and charges.

      • ONT00:59
        6h 17m
        1 stop
        STL09:16
        Mon, Feb 24|Ontario - St. Louis|Frontier Airlines
        AED 175
        AED 175

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Mon, Feb 24, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 175 including taxes and charges.

      • ONT21:06
        18h 30m
        1 stop
        STL17:36
        Mon, Mar 3|Ontario - St. Louis|Frontier Airlines
        AED 194
        AED 194

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Mon, Mar 3, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 194 including taxes and charges.

      • ONT00:59
        6h 17m
        1 stop
        STL09:16
        Wed, Feb 19|Ontario - St. Louis|Frontier Airlines
        AED 202
        AED 202

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Wed, Feb 19, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 202 including taxes and charges.

      • ONT00:59
        6h 17m
        1 stop
        STL09:16
        Sat, Feb 15|Ontario - St. Louis|Frontier Airlines
        AED 203
        AED 203

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Sat, Feb 15, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 203 including taxes and charges.

      • ONT00:59
        6h 17m
        1 stop
        STL09:16
        Wed, Mar 5|Ontario - St. Louis|Frontier Airlines
        AED 208
        AED 208

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Wed, Mar 5, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 208 including taxes and charges.

      • ONT00:59
        6h 7m
        1 stop
        STL09:06
        Wed, Apr 2|Ontario - St. Louis|Frontier Airlines
        AED 209
        AED 209

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Wed, Apr 2, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 209 including taxes and charges.

      • ONT00:59
        6h 7m
        1 stop
        STL09:06
        Wed, Apr 9|Ontario - St. Louis|Frontier Airlines
        AED 211
        AED 211

        Choose Frontier Airlines flights from Ontario to St. Louis. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Wed, Apr 9, arriving at St. Louis Lambert International Airport. One-way Prices start from AED 211 including taxes and charges.

      • ONT01:00 pm
        3h 5m
        Nonstop
        STL02:00 pm
        Sat, Feb 22|Ontario - St. Louis|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.

Los Angeles to St. Louis flight time & flight schedules

Flight info.
Departure
Arrival
Weekly Schedule

  1. F91500

    Frontier Airlines

    00:59

    ONT

    2.3h

    04:17

    DEN

    SMTWTFS
    Search

  2. F93302

    Frontier Airlines

    06:00

    DEN

    2.1h

    09:09

    STL

    SMT-TFS

  3. F92232

    Frontier Airlines

    10:52

    ONT

    1.2h

    12:04

    LAS

    SM-WTFS
    Search

  4. F93108

    Frontier Airlines

    15:39

    LAS

    3.4h

    21:05

    STL

    S--WT-S

  5. F91262

    Frontier Airlines

    12:16

    ONT

    2.3h

    15:35

    DEN

    -M--T-S
    Search

  6. F93302

    Frontier Airlines

    06:00

    DEN

    2.1h

    09:09

    STL

    SMT-TFS

  7. F91358

    Frontier Airlines

    14:42

    ONT

    1.2h

    15:53

    LAS

    SMTWTFS
    Search

  8. F92018

    Frontier Airlines

    06:00

    LAS

    3.2h

    11:10

    STL

    -MTWTFS

  9. F91358

    Frontier Airlines

    14:42

    ONT

    1.2h

    15:53

    LAS

    SMTWTFS
    Search

  10. F92430

    Frontier Airlines

    06:25

    LAS

    2.0h

    09:27

    DEN

    -MTWTFS

  11. F93302

    Frontier Airlines

    06:00

    DEN

    2.1h

    09:09

    STL

    SMT-TFS

  12. F92908

    Frontier Airlines

    17:34

    ONT

    2.3h

    20:51

    DEN

    S--WT-S
    Search

  13. F93302

    Frontier Airlines

    06:00

    DEN

    2.1h

    09:09

    STL

    SMT-TFS

  14. F94206

    Frontier Airlines

    18:35

    ONT

    1.2h

    19:48

    LAS

    SMTWTF-
    Search

  15. F93108

    Frontier Airlines

    15:39

    LAS

    3.4h

    21:05

    STL

    S--WT-S

  16. F94206

    Frontier Airlines

    18:35

    ONT

    1.2h

    19:48

    LAS

    SMTWTF-
    Search

  17. F92018

    Frontier Airlines

    06:00

    LAS

    3.2h

    11:10

    STL

    -MTWTFS

  18. F94758

    Frontier Airlines

    22:17

    ONT

    1.2h

    23:27

    LAS

    ------S
    Search

  19. F93108

    Frontier Airlines

    15:39

    LAS

    3.4h

    21:05

    STL

    S--WT-S
Find more flights and airlines

When is the cheapest time to fly from Ontario to St. Louis?

These price trend charts carefully monitor and predict how flight prices from Ontario to St. Louis will change. Keep a close eye on them to understand when the best time to buy your tickets is.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

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

    Airlines adjust prices for flights from Ontario to St. Louis based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Ontario (ONT) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around AED 1,064.

  • 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 20 km, by taxi about 40 minutes.

  • What's the most popular airline for non-stop flights from Ontario (ONT) to St. Louis (STL)?

    Spirit Airlines operates 2 non-stop flights from Ontario (ONT) to St. Louis (STL).

  • How many airports are there in St. Louis (STL)?

    There are 1 airport(s) near St. Louis (STL): St. Louis Lambert International Airport.

How to find a cheap flight from Ontario to St. Louis

If you leave it until the last minute and forget to check some of the key information when booking tickets, prices can often end up skyrocketing. Below, you can find our top tips for getting the best value flights – from changing dates to chasing deals, there are plenty ways to keep your next trip affordable.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | Ontario to St. Louis

Cheapest direct flight priceAED 167
Cheapest return ticket priceAED 738
Off-season for travelJanuary
Peak season for travelDecember
Flight distance10,023.47 km
Popular airlineAmerican Airlines

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