$180+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Oct 17 — Oct 241
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 September 17, 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 September 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/17:00 am -
1 stop26h 46m
Mon 10/59:16 am -
1 stop10h 39m
Deal found 9/15![Multiple Airlines logo]()
$371
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/299:35 am -
2 stops33h 05m
Thu 11/54:26 pm -
1 stop20h 14m
Deal found 9/14![Multiple Airlines logo]()
$372
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/184:45 pm -
2 stops21h 36m
Sat 10/244:30 pm -
1 stop20h 10m
Deal found 9/15![Multiple Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/227:45 am -
1 stop16h 28m
Mon 10/264:30 pm -
1 stop20h 40m
Deal found 9/13![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 11/229:15 am -
2 stops33h 25m
Wed 12/26:05 pm -
1 stop18h 35m
Deal found 9/16![Multiple Airlines logo]()
$419
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/297:35 am -
1 stop27h 31m
Thu 11/51:37 pm -
1 stop16h 13m
Deal found 9/14![Multiple Airlines logo]()
$428
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/2011:09 am -
1 stop10h 23m
Tue 10/277:03 am -
1 stop8h 44m
Deal found 9/15![American Airlines logo]()
$431
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/711:09 am -
1 stop10h 23m
Wed 10/147:03 am -
1 stop8h 44m
Deal found 9/14![American Airlines logo]()
$436
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/143:14 pm -
1 stop10h 14m
Wed 10/217:16 am -
1 stop9h 28m
Deal found 9/15![American Airlines logo]()
$437
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/67:29 am -
1 stop10h 48m
Wed 10/147:16 am -
1 stop9h 28m
Deal found 9/14![American Airlines logo]()
$440
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/1711:39 am -
1 stop10h 34m
Sat 10/317:03 am -
1 stop8h 44m
Deal found 9/15![American Airlines logo]()
$440
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/129:50 am -
1 stop14h 23m
Thu 10/154:30 pm -
1 stop23h 10m
Deal found 9/13![Multiple Airlines logo]()
$441
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 September 17, 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 September 17, 2026.
This Delta deal was found by Cheapflights users on 9/15. 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 2/27:00 am -
1 stop7h 25m
Wed 2/32:30 pm -
1 stop8h 21m
Deal found 9/15![Delta logo]()
$457
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/1711:23 am -
1 stop13h 36m
Tue 10/206:00 am -
1 stop10h 30m
Deal found 9/16![United Airlines logo]()
$516
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:05 am -
1 stop6h 18m
Thu 7/11:25 pm -
1 stop5h 20m
Deal found 9/13![Air Canada logo]()
$520
This United deal was found by Cheapflights users on 9/12. 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 10/248:50 am -
1 stop6h 26m
Mon 10/264:05 pm -
Nonstop1h 54m
Deal found 9/12![Multiple Airlines logo]()
$542
This Delta deal was found by Cheapflights users on 9/15. 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 11/156:00 am -
1 stop8h 28m
Sat 11/2112:35 pm -
1 stop9h 55m
Deal found 9/15![Delta logo]()
$476
This Air Canada deal was found by Cheapflights users on 9/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/309:10 am -
1 stop7h 13m
Fri 11/64:05 pm -
1 stop4h 45m
Deal found 9/15![Air Canada logo]()
$531
This United Airlines deal was found by Cheapflights users on 9/12. 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 2/22:20 pm -
1 stop6h 12m
Wed 2/36:00 am -
2 stops12h 38m
Deal found 9/12![United Airlines logo]()
$532
This United deal was found by Cheapflights users on 9/15. 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 10/177:30 am -
1 stop5h 03m
Sat 10/314:05 pm -
Nonstop1h 54m
Deal found 9/15![Multiple Airlines logo]()
$546
This Delta deal was found by Cheapflights users on 9/16. 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 11/76:33 pm -
1 stop6h 23m
Sat 11/142:45 pm -
1 stop6h 12m
Deal found 9/16![Delta logo]()
$512
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:50 pm -
1 stop4h 51m
Mon 10/264:05 pm -
1 stop6h 50m
Deal found 9/13![Air Canada logo]()
$532
This United Airlines deal was found by Cheapflights users on 9/12. 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 10/277:00 am -
2 stops10h 34m
Tue 11/311:27 am -
2 stops9h 15m
Deal found 9/12![United Airlines logo]()
$533
This United deal was found by Cheapflights users on 9/12. 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.
Thu 10/292:57 pm -
1 stop7h 55m
Tue 11/34:05 pm -
Nonstop2h 00m
Deal found 9/12![Multiple Airlines logo]()
$547
This Delta deal was found by Cheapflights users on 9/16. 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.
Wed 9/302:30 pm -
1 stop8h 09m
Fri 10/25:30 pm -
1 stop5h 29m
Deal found 9/16![Delta logo]()
$528
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/37:00 am -
1 stop6h 14m
Sun 10/46:00 am -
2 stops7h 19m
Deal found 9/13![United Airlines logo]()
$542
This United deal was found by Cheapflights users on 9/13. 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 10/312:45 pm -
1 stop5h 45m
Mon 11/24:05 pm -
Nonstop1h 54m
Deal found 9/13![Multiple Airlines logo]()
$547
This Air Canada deal was found by Cheapflights users on 9/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:55 pm -
Nonstop2h 46m
Wed 10/2112:10 pm -
Nonstop2h 31m
Deal found 9/15![Air Canada logo]()
$560
This Delta deal was found by Cheapflights users on 9/16. 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 11/811:38 am -
1 stop9h 37m
Tue 11/105:31 pm -
1 stop5h 26m
Deal found 9/16![Delta logo]()
$529
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/1311:00 am -
1 stop5h 43m
Sat 10/178:00 am -
1 stop4h 42m
Deal found 9/13![United Airlines logo]()
$542
This Delta deal was found by Cheapflights users on 9/15. 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 11/179:40 am -
2 stops11h 49m
Sun 11/222:21 pm -
1 stop8h 06m
Deal found 9/15![Delta logo]()
$529
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/103:00 pm -
2 stops8h 58m
Mon 10/123:11 pm -
1 stop7h 48m
Deal found 9/13![United Airlines logo]()
$542
This Delta deal was found by Cheapflights users on 9/15. 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 10/136:00 am -
1 stop4h 49m
Tue 10/205:35 pm -
2 stops13h 57m
Deal found 9/15![Delta logo]()
$529
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/3012:55 pm -
2 stops9h 45m
Fri 11/611:29 am -
1 stop5h 20m
Deal found 9/15![United Airlines logo]()
$542
This Delta deal was found by Cheapflights users on 9/12. 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 10/246:10 am -
1 stop8h 14m
Sun 11/15:20 pm -
1 stop4h 55m
Deal found 9/12![Delta logo]()
$530
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/188:50 am -
1 stop6h 27m
Sun 10/253:15 pm -
1 stop5h 00m
Deal found 9/13![United Airlines logo]()
$542
This Delta deal was found by Cheapflights users on 9/13. 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 11/76:10 am -
1 stop8h 14m
Mon 11/95:31 pm -
1 stop5h 26m
Deal found 9/13![Delta logo]()
$530
This United Airlines deal was found by Cheapflights users on 9/12. 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 10/2910:30 am -
2 stops8h 39m
Tue 11/36:50 pm -
1 stop4h 09m
Deal found 9/12![United Airlines logo]()
$543
This Delta deal was found by Cheapflights users on 9/13. 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 10/87:00 am -
1 stop10h 26m
Wed 10/1412:35 pm -
1 stop10h 19m
Deal found 9/13![Delta logo]()
$539
This United Airlines deal was found by Cheapflights users on 9/12. 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 10/710:15 am -
1 stop6h 28m
Wed 10/141:29 pm -
1 stop6h 15m
Deal found 9/12![United Airlines logo]()
$543
This Delta deal was found by Cheapflights users on 9/12. 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 10/16:15 am -
1 stop5h 59m
Sun 10/46:20 am -
1 stop4h 15m
Deal found 9/12![Delta logo]()
$547
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/166:10 am -
1 stop5h 16m
Fri 10/237:30 am -
2 stops11h 15m
Deal found 9/16![United Airlines logo]()
$560
Last-minute flights from Ontario to MissouriDiscover last-minute flight deals from Ontario to Missouri. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Missouri. Data last updated September 17, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/17:00 am -
1 stop26h 46m
Mon 10/59:16 am -
1 stop10h 39m
Deal found 9/15![Multiple Airlines logo]()
$371
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/67:29 am -
1 stop10h 48m
Wed 10/147:16 am -
1 stop9h 28m
Deal found 9/14![American Airlines logo]()
$440
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/711:09 am -
1 stop10h 23m
Wed 10/147:03 am -
1 stop8h 44m
Deal found 9/14![American Airlines logo]()
$436
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/129:50 am -
1 stop14h 23m
Thu 10/154:30 pm -
1 stop23h 10m
Deal found 9/13![Multiple Airlines logo]()
$441
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/143:14 pm -
1 stop10h 14m
Wed 10/217:16 am -
1 stop9h 28m
Deal found 9/15![American Airlines logo]()
$437
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/1711:39 am -
1 stop10h 34m
Sat 10/317:03 am -
1 stop8h 44m
Deal found 9/15![American Airlines logo]()
$440
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/184:45 pm -
2 stops21h 36m
Sat 10/244:30 pm -
1 stop20h 10m
Deal found 9/15![Multiple Airlines logo]()
$376
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/2011:09 am -
1 stop10h 23m
Tue 10/277:03 am -
1 stop8h 44m
Deal found 9/15![American Airlines logo]()
$431
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/227:45 am -
1 stop16h 28m
Mon 10/264:30 pm -
1 stop20h 40m
Deal found 9/13![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/299:35 am -
2 stops33h 05m
Thu 11/54:26 pm -
1 stop20h 14m
Deal found 9/14![Multiple Airlines logo]()
$372
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/297:35 am -
1 stop27h 31m
Thu 11/51:37 pm -
1 stop16h 13m
Deal found 9/14![Multiple Airlines logo]()
$428
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/2911:09 am -
1 stop10h 23m
Sat 10/317:03 am -
1 stop8h 44m
Deal found 9/15![American Airlines logo]()
$442
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 September 17, 2026.
Search for one-way flight options from Ontario to Missouri. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/69:30 am -
2 stops28h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$180
This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:00 am -
1 stop26h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$188
This Trip.com deal was found by Cheapflights users on 9/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:00 am -
1 stop26h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$190
This Trip.com deal was found by Cheapflights users on 9/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:15 am -
2 stops11h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 10/157:00 am -
2 stops35h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/124:45 pm -
2 stops21h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/194:45 pm -
2 stops21h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Fri 10/309:35 am -
3 stops35h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$241
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/143:14 pm -
1 stop9h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![American Airlines logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/297:00 am -
3 stops35h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 11/25:30 am -
3 stops32h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/247:20 pm -
3 stops43h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$266
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 September 17, 2026.
Round-trip from | $371 (Kiwi.com) |
|---|---|
One-way from | $180 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $669 |
Good round-trip deal | $513 or less |
Good one-way deal | $255 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 September 17, 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 10/6
9:30 am-1:10 pm
2 stops28h 40m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$180
TorontoKansas City
YYZ Toronto Pearson Intl - MCI Kansas City
YYZMCI
Toronto Pearson Intl
Sun 10/25
7:00 am-8:26 am
1 stop26h 26m
Kansas City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$188
TorontoKansas City
YYZ Toronto Pearson Intl - MCI Kansas City
YYZMCI
Toronto Pearson Intl
Wed 10/14
3:14 pm-11:17 pm
1 stop9h 03m
Kansas City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$249
OttawaSt. Louis
YOW Ottawa - STL Lambert-St Louis
YOWSTL
Ottawa
Thu 10/29
7:00 am-5:40 pm
3 stops35h 40m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$249
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Sat 10/10
1:15 pm-9:13 pm
1 stop8h 58m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$256
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Tue 10/6
11:40 am-6:16 pm
1 stop7h 36m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$257
TorontoSt. Louis
YYZ Toronto Pearson Intl - STL Lambert-St Louis
YYZSTL
Toronto Pearson Intl
Sat 10/3
11:10 pm-1:10 pm
3 stops39h 00m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$260
OttawaSt. Louis
YOW Ottawa - STL Lambert-St Louis
YOWSTL
Ottawa
Mon 11/2
5:30 am-1:21 pm
3 stops32h 51m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$264
MontrealSt. Louis
YUL Montreal Pierre Elliott Trudeau Intl - STL Lambert-St Louis
YULSTL
Montreal Pierre Elliott Trudeau Intl
Fri 10/30
7:50 pm-4:59 pm
1 stop22h 09m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$274
MontrealKansas City
YUL Montreal Pierre Elliott Trudeau Intl - MCI Kansas City
YULMCI
Montreal Pierre Elliott Trudeau Intl
Sat 10/24
7:20 pm-8:26 am
2 stops38h 06m
Kansas City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$278
Showing 1-10 of 60 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-MCI
YYZ-STL
YUL-STL
YOW-STL
YUL-MCI
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-MCI
YYZ-STL
YUL-STL
YOW-STL
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 $421). 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 September 17, 2026.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 20% on flights from Region of Ontario to Missouri by exploring options for tickets at noon.
Weekly flight availability from Region of Ontario to Missouri
Explore weekly flight availability from Ontario to Missouri. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 17, 2026.
The most flights from CAON to USMO are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).
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 $536 and $693 in October.The cheapest round-trip price found within the last 5 days was $372 on Multiple Airlines (Oct 29-Nov 5).
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 September 17, 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
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Comfort
7.8
Overall
7.8
Food
7.2
Crew
8.5
Entertainment
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
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 September 17, 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 September 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$226 | Average$545 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$231 | Average$433 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$443 | Average$573 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$450 | Average$543 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$530 | Average$734 | FlexibilityNo cancel fee | On-time60% |