$87+ Cheap flights from Washington, D.C. (WAS) to Ontario
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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YYZ
Nov 12 — Nov 191
Round-trip
1 adult, Economy
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Find cheap flights from Washington, D.C. to Ontario 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 Washington, D.C. to Ontario
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Cheapest flights from Washington, D.C. to OntarioExplore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 13, 2026.
Explore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 10/2711:20 am -
Nonstop1h 32m
Fri 11/274:15 pm -
Nonstop1h 29m
Deal found 10/11![Porter Airlines logo]()
$211
This Justfly.com deal was found by Cheapflights users on 10/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:20 am -
Nonstop1h 32m
Sun 11/19:10 am -
Nonstop1h 29m
Deal found 10/11![Porter Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Mon 10/2611:20 am -
Nonstop1h 32m
Tue 11/39:10 am -
Nonstop1h 29m
Deal found 10/12![Porter Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 10/3111:20 am -
Nonstop1h 32m
Tue 12/19:10 am -
Nonstop1h 30m
Deal found 10/11![Porter Airlines logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 10/10. 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 10/3111:20 am -
Nonstop1h 32m
Mon 11/29:10 am -
Nonstop1h 29m
Deal found 10/10![Porter Airlines logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/611:20 am -
Nonstop1h 30m
Wed 12/29:10 am -
Nonstop1h 30m
Deal found 10/11![Porter Airlines logo]()
$217
This Super.com deal was found by Cheapflights users on 10/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3011:20 am -
Nonstop1h 32m
Sun 11/19:10 am -
Nonstop1h 29m
Deal found 10/9![Porter Airlines logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/411:20 am -
Nonstop1h 30m
Wed 12/29:10 am -
Nonstop1h 30m
Deal found 10/11![Porter Airlines logo]()
$220
This Gotogate deal was found by Cheapflights users on 10/8. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:59 am -
Nonstop1h 33m
Sun 11/17:10 am -
1 stop5h 09m
Deal found 10/8![Air Canada logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/411:20 am -
Nonstop1h 30m
Sat 11/289:10 am -
Nonstop1h 29m
Deal found 10/11![Porter Airlines logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/111:20 am -
Nonstop1h 30m
Thu 12/39:10 am -
Nonstop1h 30m
Deal found 10/11![Porter Airlines logo]()
$222
This Booking.com deal was found by Cheapflights users on 10/8. 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 11/56:59 am -
Nonstop1h 33m
Sun 11/87:20 am -
Nonstop1h 38m
Deal found 10/8![Air Canada logo]()
$222
Best flights from Washington, D.C. to OntarioDiscover carefully curated flight deals from Washington, D.C. to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 13, 2026.
Discover carefully curated flight deals from Washington, D.C. to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 13, 2026.
This Trip.com deal was found by Cheapflights users on 10/12. 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.
Sat 11/2811:20 am -
Nonstop1h 30m
Wed 12/29:10 am -
Nonstop1h 30m
Deal found 10/12![Porter Airlines logo]()
$227
This Delta deal was found by Cheapflights users on 10/8. 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 12/39:45 am -
1 stop7h 35m
Sun 12/66:00 am -
1 stop5h 34m
Deal found 10/8![Delta logo]()
$255
This United Airlines deal was found by Cheapflights users on 10/8. 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 11/112:39 pm -
Nonstop1h 46m
Tue 11/37:44 pm -
Nonstop1h 42m
Deal found 10/8![United Airlines logo]()
$266
This United deal was found by Cheapflights users on 10/8. 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.
Mon 11/1610:10 pm -
Nonstop1h 42m
Fri 11/206:40 pm -
Nonstop1h 30m
Deal found 10/8![Multiple Airlines logo]()
$266
This Air Canada deal was found by Cheapflights users on 10/9. 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.
Sat 11/76:00 am -
1 stop5h 37m
Sat 11/145:45 am -
1 stop4h 39m
Deal found 10/9![Air Canada logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Sat 11/711:20 am -
Nonstop1h 30m
Mon 11/99:10 am -
Nonstop1h 29m
Deal found 10/12![Porter Airlines logo]()
$228
This Delta deal was found by Cheapflights users on 10/8. 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 11/206:05 am -
1 stop5h 14m
Sun 11/2210:14 am -
1 stop5h 43m
Deal found 10/8![Delta logo]()
$255
This United deal was found by Cheapflights users on 10/8. 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.
Fri 10/2310:40 pm -
1 stop10h 39m
Sat 10/312:15 pm -
Nonstop1h 30m
Deal found 10/8![Multiple Airlines logo]()
$276
This United Airlines deal was found by Cheapflights users on 10/8. 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 11/21:15 pm -
1 stop8h 00m
Tue 11/37:44 pm -
Nonstop1h 42m
Deal found 10/8![United Airlines logo]()
$276
This Delta deal was found by Cheapflights users on 10/8. 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 11/149:45 am -
1 stop7h 35m
Tue 11/1710:14 am -
1 stop8h 38m
Deal found 10/8![Delta logo]()
$255
This Delta deal was found by Cheapflights users on 10/8. 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 10/245:05 pm -
1 stop6h 24m
Mon 10/262:26 pm -
1 stop8h 41m
Deal found 10/8![Delta logo]()
$255
This United deal was found by Cheapflights users on 10/12. 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.
Tue 10/2711:49 am -
1 stop12h 10m
Thu 10/298:05 am -
1 stop4h 14m
Deal found 10/12![Multiple Airlines logo]()
$281
This United Airlines deal was found by Cheapflights users on 10/11. 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 11/257:00 am -
1 stop4h 48m
Wed 12/25:55 pm -
1 stop4h 48m
Deal found 10/11![United Airlines logo]()
$291
This Delta deal was found by Cheapflights users on 10/9. 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 11/2012:35 pm -
1 stop4h 39m
Sun 11/226:00 am -
1 stop4h 57m
Deal found 10/9![Delta logo]()
$255
This United deal was found by Cheapflights users on 10/11. 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 12/128:45 am -
1 stop5h 18m
Mon 12/145:30 pm -
1 stop4h 29m
Deal found 10/11![Multiple Airlines logo]()
$284
This United Airlines deal was found by Cheapflights users on 10/8. 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 11/63:30 pm -
1 stop5h 45m
Wed 11/119:44 am -
1 stop4h 43m
Deal found 10/8![United Airlines logo]()
$291
This Delta deal was found by Cheapflights users on 10/9. 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 10/276:32 pm -
1 stop4h 57m
Tue 11/312:10 pm -
1 stop4h 18m
Deal found 10/9![Delta logo]()
$255
This United deal was found by Cheapflights users on 10/12. 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 11/286:10 am -
1 stop11h 39m
Wed 12/21:00 pm -
1 stop7h 23m
Deal found 10/12![Multiple Airlines logo]()
$284
This United Airlines deal was found by Cheapflights users on 10/11. 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 11/148:30 am -
1 stop8h 17m
Sun 11/156:45 am -
1 stop5h 19m
Deal found 10/11![United Airlines logo]()
$291
This Delta deal was found by Cheapflights users on 10/8. 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 10/316:05 am -
1 stop5h 14m
Tue 11/36:00 am -
1 stop5h 50m
Deal found 10/8![Delta logo]()
$255
This Booking.com deal was found by Cheapflights users on 10/8. 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 11/511:05 am -
1 stop4h 52m
Mon 11/910:30 am -
Nonstop1h 49m
Deal found 10/8![Air Canada logo]()
$439
This Delta deal was found by Cheapflights users on 10/9. 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 10/296:05 am -
1 stop7h 31m
Thu 11/56:00 am -
1 stop5h 50m
Deal found 10/9![Delta logo]()
$255
This United Airlines deal was found by Cheapflights users on 10/12. 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.
Mon 10/265:20 pm -
Nonstop1h 37m
Wed 10/283:20 pm -
Nonstop1h 27m
Deal found 10/12![United Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 10/9. 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 12/36:00 am -
1 stop7h 35m
Sun 12/66:00 am -
1 stop4h 42m
Deal found 10/9![Delta logo]()
$255
This Air Canada deal was found by Cheapflights users on 10/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/612:55 pm -
Nonstop1h 34m
Sun 2/710:30 am -
Nonstop1h 49m
Deal found 10/12![Air Canada logo]()
$468
This United Airlines deal was found by Cheapflights users on 10/8. 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 10/296:11 am -
1 stop10h 31m
Mon 11/23:20 pm -
Nonstop1h 27m
Deal found 10/8![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 10/12. 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 2/2711:05 am -
1 stop4h 59m
Mon 3/16:00 am -
1 stop4h 13m
Deal found 10/12![Delta logo]()
$263
This Air Canada deal was found by Cheapflights users on 10/11. 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 1/1512:55 pm -
Nonstop1h 34m
Mon 1/185:40 pm -
1 stop4h 19m
Deal found 10/11![Air Canada logo]()
$477
This United Airlines deal was found by Cheapflights users on 10/9. 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 11/410:15 am -
1 stop6h 27m
Sun 11/83:20 pm -
Nonstop1h 27m
Deal found 10/9![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 10/12. 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.
Wed 10/2812:30 pm -
1 stop5h 08m
Fri 10/306:10 pm -
1 stop5h 06m
Deal found 10/12![Delta logo]()
$263
Last-minute flights from Washington, D.C. to OntarioDiscover last-minute flight deals from Washington, D.C. to Ontario. Data last updated October 13, 2026 and is based on user searches.
Discover last-minute flight deals from Washington, D.C. to Ontario. Data last updated October 13, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Mon 10/2611:20 am -
Nonstop1h 32m
Tue 11/39:10 am -
Nonstop1h 29m
Deal found 10/12![Porter Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 10/2711:20 am -
Nonstop1h 32m
Fri 11/274:15 pm -
Nonstop1h 29m
Deal found 10/11![Porter Airlines logo]()
$211
This Gotogate deal was found by Cheapflights users on 10/8. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:59 am -
Nonstop1h 33m
Sun 11/17:10 am -
1 stop5h 09m
Deal found 10/8![Air Canada logo]()
$220
This Super.com deal was found by Cheapflights users on 10/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3011:20 am -
Nonstop1h 32m
Sun 11/19:10 am -
Nonstop1h 29m
Deal found 10/9![Porter Airlines logo]()
$218
This Justfly.com deal was found by Cheapflights users on 10/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:20 am -
Nonstop1h 32m
Sun 11/19:10 am -
Nonstop1h 29m
Deal found 10/11![Porter Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 10/3111:20 am -
Nonstop1h 32m
Tue 12/19:10 am -
Nonstop1h 30m
Deal found 10/11![Porter Airlines logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 10/10. 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 10/3111:20 am -
Nonstop1h 32m
Mon 11/29:10 am -
Nonstop1h 29m
Deal found 10/10![Porter Airlines logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/111:20 am -
Nonstop1h 30m
Thu 12/39:10 am -
Nonstop1h 30m
Deal found 10/11![Porter Airlines logo]()
$222
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/411:20 am -
Nonstop1h 30m
Wed 12/29:10 am -
Nonstop1h 30m
Deal found 10/11![Porter Airlines logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/411:20 am -
Nonstop1h 30m
Sat 11/289:10 am -
Nonstop1h 29m
Deal found 10/11![Porter Airlines logo]()
$221
This Booking.com deal was found by Cheapflights users on 10/8. 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 11/56:59 am -
Nonstop1h 33m
Sun 11/87:20 am -
Nonstop1h 38m
Deal found 10/8![Air Canada logo]()
$222
This Kiwi.com deal was found by Cheapflights users on 10/11. 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 11/611:20 am -
Nonstop1h 30m
Wed 12/29:10 am -
Nonstop1h 30m
Deal found 10/11![Porter Airlines logo]()
$217
One-way flights from Washington, D.C. to OntarioSearch for one-way flight options from Washington, D.C. to Ontario. Find affordable one-way fares based on user searches. Data last updated October 13, 2026.
Search for one-way flight options from Washington, D.C. to Ontario. Find affordable one-way fares based on user searches. Data last updated October 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Fri 12/46:25 pm -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Porter Airlines logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 10/9. 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 10/2511:20 am -
Nonstop1h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/9![Porter Airlines logo]()
$88
This Super.com deal was found by Cheapflights users on 10/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:25 pm -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Porter Airlines logo]()
$89
This Air Canada deal was found by Cheapflights users on 10/8. 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.
Tue 10/276:59 am -
Nonstop1h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Air Canada logo]()
$89
This Air Canada deal was found by Cheapflights users on 10/8. 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.
Tue 10/279:55 am -
Nonstop1h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Air Canada logo]()
$89
This FlightHub deal was found by Cheapflights users on 10/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1911:20 am -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Porter Airlines logo]()
$91
This Trip.com deal was found by Cheapflights users on 10/11. 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.
Tue 10/2711:20 am -
Nonstop1h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Porter Airlines logo]()
$92
This Trip.com deal was found by Cheapflights users on 10/10. 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.
Sat 11/2111:20 am -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Porter Airlines logo]()
$93
This Air Canada deal was found by Cheapflights users on 10/10. 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 11/56:59 am -
Nonstop1h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Air Canada logo]()
$93
This Air Canada deal was found by Cheapflights users on 10/10. 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 12/49:55 am -
Nonstop1h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Air Canada logo]()
$93
This Jetabroad deal was found by Cheapflights users on 10/10. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/711:20 am -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Porter Airlines logo]()
$94
This Air Canada deal was found by Cheapflights users on 10/9. 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.
Sat 10/2412:50 pm -
1 stop6h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/9![Air Canada logo]()
$94
Find flight deals from Washington, D.C. to Ontario
Keep the following information in mind while searching for Washington, D.C. to Ontario flight deals. Data was last updated October 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $211 (Kiwi.com) |
One-way from | $87 (Kiwi.com) |
Popular in | May |
Cheapest in | January |
Average price | $289 |
Good round-trip deal | $227 or less |
Good one-way deal | $107 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington, D.C. to Ontario 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 October 13, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
Washington, D.C.Toronto
IAD Washington, D.C. Dulles Intl - YTZ Toronto Island
IADYTZ
Washington, D.C. Dulles Intl
Fri 11/20
6:25 pm-7:55 pm
Nonstop1h 30m
Toronto Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$89
Washington, D.C.Toronto
IAD Washington, D.C. Dulles Intl - YTZ Toronto Island
IADYTZ
Washington, D.C. Dulles Intl
Thu 10/29
11:20 am-12:52 pm
Nonstop1h 32m
Toronto Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$89
Washington, D.C.Toronto
IAD Washington, D.C. Dulles Intl - YTZ Toronto Island
IADYTZ
Washington, D.C. Dulles Intl
Thu 12/10
11:20 am-12:50 pm
Nonstop1h 30m
Toronto Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$91
Washington, D.C.Toronto
DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl
DCAYYZ
Washington, D.C. Reagan-National
Wed 11/11
9:45 am-5:20 pm
1 stop7h 35m
Toronto Pearson Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$99
Washington, D.C.Toronto
DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl
DCAYYZ
Washington, D.C. Reagan-National
Sat 10/24
6:26 pm-10:56 pm
1 stop4h 30m
Toronto Pearson Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$99
Washington, D.C.Toronto
DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl
DCAYYZ
Washington, D.C. Reagan-National
Sat 12/12
6:26 pm-11:07 pm
1 stop4h 41m
Toronto Pearson Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$99
Washington, D.C.Toronto
DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl
DCAYYZ
Washington, D.C. Reagan-National
Fri 11/20
6:05 am-11:19 am
1 stop5h 14m
Toronto Pearson Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$99
Washington, D.C.Toronto
DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl
DCAYYZ
Washington, D.C. Reagan-National
Sun 11/22
6:10 am-1:30 pm
1 stop7h 20m
Toronto Pearson Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$99
Washington, D.C.Toronto
IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl
IADYYZ
Washington, D.C. Dulles Intl
Fri 12/11
5:14 pm-11:07 pm
1 stop5h 53m
Toronto Pearson Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$99
Washington, D.C.Toronto
IAD Washington, D.C. Dulles Intl - YYZ Toronto Pearson Intl
IADYYZ
Washington, D.C. Dulles Intl
Fri 11/20
12:35 pm-5:14 pm
1 stop4h 39m
Toronto Pearson Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$99
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington, D.C. to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Washington, D.C. with our price prediction graph.
IAD-YTZ
DCA-YYZ
IAD-YYZ
BWI-YYZ
BWI-YOW
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 Washington, D.C. to Ontario
WAS-CAON
IAD-YTZ
DCA-YYZ
IAD-YYZ
BWI-YYZ
What is the cheapest month to book a flight from Washington, D.C. to Region of Ontario?
Currently, December is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of $310). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of $369). 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 WAS to ON?
Find hourly flight availability from Washington, D.C. to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 13, 2026.
It’s optimal to fly from Washington, D.C. to Region of Ontario at noon. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight in the morning.
Weekly flight availability from Washington, D.C. to Region of Ontario
Explore weekly flight availability from Washington, D.C. to Ontario. 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 October 13, 2026.
The most flights from WAS to CAON are scheduled on a Monday (35 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (25 on average).
How much does it cost to fly round-trip from Washington, D.C. to Region of Ontario?
Airfare is below average for this route at the moment.
Washington, D.C. to Region of Ontario flights typically cost between $249 and $451 in November.The cheapest round-trip price found within the last 5 days was $220 on Air Canada (Nov 21-Nov 23).
How far ahead should I book a flight from Washington, D.C. to Region of Ontario?
To ensure you get the cheapest price possible for a flight from Washington, D.C. to Region of Ontario, you should look to book at least 61 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.
What is the cheapest day to fly from Washington, D.C. to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Ontario. Price data was last updated on November 25, 2025.
Travelers seeking maximum savings on their Washington, D.C. to Region of Ontario flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated October 13, 2026.
Peruse reviews from past customers who have flown with Porter Airlines,Air Transat, andUnited Airlines from Washington, D.C. to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Boarding
8.2
Overall
8.0
Comfort
8.0
Entertainment
7.0
Food
7.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Crew
8.6
Boarding
8.2
Overall
8.0
Comfort
8.0
Entertainment
7.0
Food
7.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Crew
8.6
Boarding
8.2
Overall
8.0
Comfort
8.0
Entertainment
7.0
Food
7.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Crew
8.6
Boarding
8.2
Overall
8.0
Comfort
8.0
Entertainment
7.0
Food
7.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Crew
8.6
Boarding
8.2
Overall
8.0
Comfort
8.0
Entertainment
7.0
Food
7.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Crew
8.6
Boarding
8.2
Overall
8.0
Comfort
8.0
Entertainment
7.0
Food
7.6
Reviews
1 / 20
6.0
GoodShannon,Jul 2026
YQT - YOW
Related info for your journey
Find useful and relevant information for your journey from Washington, D.C. to Ontario. 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 Washington, D.C. to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Washington, D.C. to Ontario by cabin class
Find flights from Washington, D.C. to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Washington, D.C. and Ontario flights
Browse other Washington, D.C. and Ontario flight options. Last updated on October 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Washington, D.C. to Ontario flights
Consider these flights traveling from Washington, D.C. to Ontario.
Top 7 airlines flying from Washington, D.C. to Ontario
Discover the top 7 airlines that operate flights from Washington, D.C. to Ontario. 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 October 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$96 | Average$387 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$106 | Average$411 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$128 | Average$354 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$139 | Average$470 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$263 | Average$364 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$263 | Average$527 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$496 | Average$689 | FlexibilityNo cancel fee | On-time60% |