$189+ Cheap flights from Ontario to Missouri
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Dec 2 — Dec 91
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Missouri with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Missouri
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Cheapest flights from Ontario to MissouriExplore the most affordable flight options available from Ontario to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 2, 2026.
Explore the most affordable flight options available from Ontario to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 am -
1 stop18h 29m
Mon 12/712:02 pm -
2 stops32h 49m
Deal found 11/1![Multiple Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/142:25 pm -
2 stops45h 52m
Mon 12/216:20 pm -
1 stop18h 20m
Deal found 10/31![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/167:15 am -
1 stop17h 57m
Wed 12/236:21 pm -
2 stops28h 34m
Deal found 10/31![Multiple Airlines logo]()
$403
This American Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/811:36 am -
1 stop9h 22m
Fri 12/117:27 am -
1 stop9h 16m
Deal found 10/31![American Airlines logo]()
$415
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:30 am -
1 stop18h 29m
Thu 12/36:13 pm -
1 stop18h 27m
Deal found 10/29![Multiple Airlines logo]()
$416
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/111:45 am -
1 stop9h 05m
Thu 12/37:27 am -
1 stop9h 16m
Deal found 10/30![American Airlines logo]()
$430
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/213:15 pm -
1 stop7h 59m
Sat 1/168:19 pm -
1 stop15h 22m
Deal found 10/30![American Airlines logo]()
$431
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2311:45 am -
1 stop8h 42m
Mon 12/76:48 am -
1 stop8h 42m
Deal found 11/1![American Airlines logo]()
$442
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/511:36 am -
1 stop8h 30m
Mon 12/76:48 am -
1 stop8h 42m
Deal found 11/1![American Airlines logo]()
$446
This American Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2211:45 am -
1 stop9h 19m
Wed 12/27:27 am -
1 stop9h 16m
Deal found 10/29![American Airlines logo]()
$451
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/147:35 am -
1 stop9h 24m
Wed 12/168:32 pm -
2 stops24h 23m
Deal found 11/2![Multiple Airlines logo]()
$453
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:35 am -
1 stop26h 21m
Wed 11/188:43 pm -
2 stops21h 56m
Deal found 10/29![Multiple Airlines logo]()
$459
Best flights from Ontario to MissouriDiscover carefully curated flight deals from Ontario to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 2, 2026.
Discover carefully curated flight deals from Ontario to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:30 am -
1 stop28h 46m
Thu 12/38:29 pm -
2 stops16h 11m
Deal found 10/29![Multiple Airlines logo]()
$515
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/97:50 am -
1 stop10h 24m
Wed 1/131:37 pm -
1 stop8h 40m
Deal found 10/30![Delta logo]()
$533
This United Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/138:35 am -
1 stop7h 03m
Tue 12/157:30 am -
1 stop10h 15m
Deal found 11/1![United Airlines logo]()
$624
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/237:14 am -
1 stop12h 46m
Wed 12/307:43 pm -
1 stop14h 16m
Deal found 10/30![American Airlines logo]()
$627
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/89:45 am -
1 stop8h 21m
Wed 12/95:55 pm -
1 stop4h 12m
Deal found 11/1![Delta logo]()
$563
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/206:25 pm -
1 stop15h 12m
Tue 12/227:43 pm -
1 stop15h 55m
Deal found 11/1![American Airlines logo]()
$629
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/306:14 am -
1 stop7h 46m
Thu 2/47:02 am -
1 stop8h 12m
Deal found 11/2![Delta logo]()
$580
This United Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/163:35 pm -
1 stop8h 35m
Mon 11/303:10 pm -
1 stop5h 05m
Deal found 11/1![United Airlines logo]()
$639
This United deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:45 am -
1 stop6h 25m
Sat 12/54:05 pm -
Nonstop2h 00m
Deal found 10/29![Multiple Airlines logo]()
$679
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/266:14 am -
1 stop7h 32m
Thu 1/2810:14 am -
1 stop5h 56m
Deal found 10/31![Delta logo]()
$580
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/104:30 pm -
1 stop7h 29m
Sun 12/134:05 pm -
Nonstop2h 00m
Deal found 10/29![United Airlines logo]()
$678
This United deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/53:35 pm -
1 stop6h 54m
Mon 12/74:05 pm -
Nonstop2h 00m
Deal found 11/1![Multiple Airlines logo]()
$682
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/26:14 am -
1 stop7h 32m
Thu 2/46:30 am -
1 stop4h 03m
Deal found 11/2![Delta logo]()
$580
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:45 am -
1 stop6h 25m
Sat 12/56:55 pm -
1 stop13h 52m
Deal found 10/29![United Airlines logo]()
$678
This United deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/222:57 pm -
1 stop7h 55m
Mon 11/234:05 pm -
Nonstop2h 00m
Deal found 11/1![Multiple Airlines logo]()
$682
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/49:45 am -
1 stop4h 51m
Fri 2/55:29 pm -
1 stop4h 45m
Deal found 11/2![Delta logo]()
$596
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/205:55 pm -
1 stop6h 43m
Thu 12/319:35 am -
2 stops8h 26m
Deal found 10/30![United Airlines logo]()
$682
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/299:45 am -
1 stop4h 51m
Thu 2/46:30 am -
1 stop4h 03m
Deal found 11/2![Delta logo]()
$596
This United Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/236:55 pm -
1 stop16h 47m
Wed 12/304:05 pm -
Nonstop2h 00m
Deal found 11/1![United Airlines logo]()
$684
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/139:45 am -
1 stop4h 45m
Mon 12/146:05 pm -
2 stops14h 05m
Deal found 10/30![Delta logo]()
$606
This United Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/233:35 pm -
1 stop8h 49m
Mon 11/304:05 pm -
Nonstop2h 00m
Deal found 11/1![United Airlines logo]()
$684
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/189:45 am -
1 stop4h 45m
Tue 12/226:30 am -
1 stop3h 45m
Deal found 10/29![Delta logo]()
$609
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/86:15 am -
1 stop14h 11m
Fri 12/116:30 am -
1 stop6h 39m
Deal found 10/29![United Airlines logo]()
$689
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/177:00 am -
3 stops16h 42m
Thu 12/246:00 am -
2 stops10h 56m
Deal found 11/1![American Airlines logo]()
$1,184
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2010:14 am -
1 stop8h 50m
Thu 11/2612:00 pm -
1 stop4h 20m
Deal found 10/29![Delta logo]()
$609
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/83:10 pm -
2 stops8h 57m
Thu 12/109:40 am -
2 stops11h 16m
Deal found 10/29![United Airlines logo]()
$689
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:30 am -
1 stop27h 50m
Mon 11/305:22 pm -
1 stop4h 49m
Deal found 11/1![Delta logo]()
$614
This United Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/176:00 am -
2 stops18h 27m
Thu 12/247:45 am -
1 stop12h 38m
Deal found 11/1![United Airlines logo]()
$690
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/286:15 am -
1 stop5h 22m
Thu 12/36:30 am -
2 stops7h 37m
Deal found 10/28![United Airlines logo]()
$702
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/279:45 am -
1 stop10h 45m
Thu 12/36:00 am -
1 stop6h 11m
Deal found 10/28![United Airlines logo]()
$702
Last-minute flights from Ontario to MissouriDiscover last-minute flight deals from Ontario to Missouri. Data last updated November 2, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Missouri. Data last updated November 2, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:35 am -
3 stops29h 58m
Wed 12/212:05 pm -
2 stops24h 35m
Deal found 10/29![Multiple Airlines logo]()
$497
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:35 am -
1 stop26h 21m
Wed 11/188:43 pm -
2 stops21h 56m
Deal found 10/29![Multiple Airlines logo]()
$459
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/213:15 pm -
1 stop7h 59m
Sat 1/168:19 pm -
1 stop15h 22m
Deal found 10/30![American Airlines logo]()
$431
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:30 am -
1 stop18h 29m
Sat 1/167:02 pm -
2 stops17h 38m
Deal found 10/30![Multiple Airlines logo]()
$455
This American Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2211:45 am -
1 stop9h 19m
Wed 12/27:27 am -
1 stop9h 16m
Deal found 10/29![American Airlines logo]()
$451
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 am -
1 stop18h 29m
Mon 12/712:02 pm -
2 stops32h 49m
Deal found 11/1![Multiple Airlines logo]()
$370
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2311:45 am -
1 stop8h 42m
Mon 12/76:48 am -
1 stop8h 42m
Deal found 11/1![American Airlines logo]()
$442
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 am -
1 stop18h 29m
Mon 11/303:04 pm -
2 stops14h 47m
Deal found 11/1![Multiple Airlines logo]()
$500
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:30 am -
1 stop18h 29m
Thu 12/36:13 pm -
1 stop18h 27m
Deal found 10/29![Multiple Airlines logo]()
$416
This American Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:09 am -
1 stop8h 58m
Thu 12/35:48 am -
1 stop9h 43m
Deal found 10/29![American Airlines logo]()
$481
This Booking.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:30 am -
3 stops38h 04m
Thu 12/38:29 pm -
2 stops16h 11m
Deal found 10/29![Multiple Airlines logo]()
$486
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:30 am -
1 stop18h 29m
Mon 12/712:02 pm -
2 stops32h 49m
Deal found 11/1![Multiple Airlines logo]()
$489
One-way flights from Ontario to MissouriSearch for one-way flight options from Ontario to Missouri. Find affordable one-way fares based on user searches. Data last updated November 2, 2026.
Search for one-way flight options from Ontario to Missouri. Find affordable one-way fares based on user searches. Data last updated November 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/142:25 pm -
2 stops45h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 am -
1 stop18h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Multiple Airlines logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:30 am -
1 stop30h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Multiple Airlines logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/159:35 am -
2 stops26h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$222
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/214:20 pm -
1 stop26h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:30 am -
1 stop18h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$230
This American Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/153:22 pm -
1 stop9h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![American Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/146:00 am -
2 stops14h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Delta logo]()
$238
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/161:22 pm -
1 stop11h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![American Airlines logo]()
$241
This American Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:30 pm -
1 stop10h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![American Airlines logo]()
$245
This American Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/173:25 pm -
1 stop8h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![American Airlines logo]()
$245
This Thrive Travel deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Thrive Travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:10 am -
1 stop14h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Qatar Airways logo]()
$256
Find flight deals from Ontario to Missouri
Keep the following information in mind while searching for Ontario to Missouri flight deals. Data was last updated November 2, 2026.
Round-trip from | $366 (Kiwi.com) |
|---|---|
One-way from | $189 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $649 |
Good round-trip deal | $616 or less |
Good one-way deal | $444 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Missouri that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated November 2, 2026.
Use the filters below to find and compare flights from Ontario to Missouri that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Tue 12/15
9:35 am-11:17 am
2 stops26h 42m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$222
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Mon 11/23
6:30 am-4:20 pm
2 stops34h 50m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$227
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Sat 12/5
6:30 am-12:12 am
1 stop18h 42m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$230
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Tue 12/15
3:22 pm-12:02 am
1 stop9h 40m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$237
TorontoKansas City
YYZ Toronto Pearson Intl - MCI Kansas City
YYZMCI
Toronto Pearson Intl
Mon 12/14
6:00 am-7:19 pm
2 stops14h 19m
Kansas City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$238
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Wed 12/16
1:22 pm-12:02 am
1 stop11h 40m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$241
TorontoKansas City
YYZ Toronto Pearson Intl - MCI Kansas City
YYZMCI
Toronto Pearson Intl
Tue 12/15
12:30 pm-10:13 pm
1 stop10h 43m
Kansas City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$260
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Wed 12/16
2:25 pm-10:53 am
3 stops45h 28m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$270
TorontoKansas City
YYZ Toronto Pearson Intl - MCI Kansas City
YYZMCI
Toronto Pearson Intl
Sun 12/13
6:00 am-7:19 pm
2 stops14h 19m
Kansas City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$275
TorontoKansas City
YYZ Toronto Pearson Intl - MCI Kansas City
YYZMCI
Toronto Pearson Intl
Thu 12/3
1:40 pm-7:33 pm
2 stops30h 53m
Kansas City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$282
Showing 1-10 of 57 resultsSorted by cheapest first
Best time to book a flight from Ontario to Missouri
Have a flexible travel schedule? Discover the best time to fly to Missouri from Ontario with our price prediction graph.
YYZ-STL
YYZ-MCI
YYZ-SGF
YOW-MCI
YSB-STL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Missouri
CAON-USMO
YYZ-STL
YYZ-MCI
YYZ-SGF
YOW-MCI
What is the cheapest month to book a flight from Region of Ontario to Missouri?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Missouri (average of $422). Flying from Region of Ontario to Missouri in July is currently the most expensive (average of $958). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ON to MO?
Find hourly flight availability from Ontario to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 2, 2026.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 21% on flights from Region of Ontario to Missouri by exploring options for tickets at noon.
How much does it cost to fly round-trip from Region of Ontario to Missouri?
Airfare is below average for this route at the moment.
Region of Ontario to Missouri flights typically cost between $579 and $665 in November.The cheapest round-trip price found within the last 5 days was $370 on Multiple Airlines (Nov 23-Dec 7).
How far ahead should I book a flight from Region of Ontario to Missouri?
To ensure you get the cheapest price possible for a flight from Region of Ontario to Missouri, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Reviews of airlines servicing Missouri
Get insights into the airlines that provide service to Missouri. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missouri. Reviews last updated November 2, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andWestJet from Ontario to Missouri to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Comfort
7.8
Overall
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Missouri. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Ontario to Missouri
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Missouri by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Missouri by cabin class
Find flights from Ontario to Missouri, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Missouri flights
Browse other Ontario and Missouri flight options. Last updated on November 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Missouri
Find the right flight back to Ontario after your stay in Missouri
Ontario to Missouri flights
Consider these flights traveling from Ontario to Missouri.
Top 5 airlines flying from Ontario to Missouri
Discover the top 5 airlines that operate flights from Ontario to Missouri. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated November 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$226 | Average$489 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$256 | Average$473 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$438 | Average$565 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$450 | Average$543 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$530 | Average$735 | FlexibilityNo cancel fee | On-time60% |