Cheap Business Class Flights from Ontario to Seattle
ONT — SEA
Aug 19 — Aug 261
Round-trip
1 adult, Business
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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.Essential info for Business Class flights from Ontario to Seattle
Find the latest flights to Seattle in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 2,558,603 searches and data were last updated on July 20, 2026.
Top Rated Airline | American Airlines |
|---|---|
No. of Airlines | 6 |
Arrival Airport | Seattle/Tacoma Intl Airport |
Find Business Class flight deals from Ontario to Seattle
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Cheapest business class flights to SeattleExplore the most affordable business class flight options available to Seattle. Find the lowest fares based on data from user searches, with prices last updated on July 20, 2026.
Explore the most affordable business class flight options available to Seattle. Find the lowest fares based on data from user searches, with prices last updated on July 20, 2026.
This Expedia deal was found by Cheapflights users on 7/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:05 pm
ONT
- SEA
Nonstop2h 56m
Frontier
Sun 9/2711:15 am
SEA
- ONT
Nonstop2h 48m
Frontier
Deal found 7/18![Frontier logo]()
$401
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:05 pm
ONT
- SEA
Nonstop2h 56m
Frontier
Fri 9/1811:15 am
SEA
- ONT
Nonstop2h 48m
Frontier
Deal found 7/19![Frontier logo]()
$451
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:17 pm
ONT
- SEA
1 stop12h 22m
Frontier
Sat 9/1211:15 am
SEA
- ONT
Nonstop2h 48m
Frontier
Deal found 7/19![Frontier logo]()
$476
This Expedia deal was found by Cheapflights users on 7/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
ONT
- SEA
1 stop27h 04m
Frontier
Wed 8/1212:19 pm
SEA
- ONT
Nonstop2h 55m
Frontier
Deal found 7/15![Frontier logo]()
$512
This Expedia deal was found by Cheapflights users on 7/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/84:09 pm
ONT
- SEA
Nonstop2h 49m
Frontier
Tue 8/118:13 pm
SEA
- ONT
1 stop11h 50m
Frontier
Deal found 7/15![Frontier logo]()
$518
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:02 am
ONT
- SEA
Nonstop2h 47m
Alaska Airlines
Tue 10/207:30 am
SEA
- ONT
Nonstop2h 47m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$537
Best business class flights to SeattleDiscover carefully curated business class flight deals to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 20, 2026.
Discover carefully curated business class flight deals to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 20, 2026.
This Expedia deal was found by Cheapflights users on 7/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
ONT
- SEA
1 stop27h 04m
Frontier
Wed 8/127:06 pm
SEA
- ONT
1 stop28h 44m
Frontier
Deal found 7/15![Frontier logo]()
$522
This Alaska Airlines deal was found by Cheapflights users on 7/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:59 pm
ONT
- SEA
Nonstop2h 42m
Alaska Airlines
Tue 9/158:23 am
SEA
- ONT
Nonstop2h 53m
Alaska Airlines
Deal found 7/15![Alaska Airlines logo]()
$567
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/411:50 am
ONT
- SEA
1 stop22h 49m
Frontier
Sat 9/129:16 pm
SEA
- ONT
1 stop13h 05m
Frontier
Deal found 7/19![Frontier logo]()
$541
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1411:13 am
ONT
- SEA
Nonstop2h 49m
Alaska Airlines
Sat 10/1712:13 pm
SEA
- ONT
1 stop4h 37m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$577
This Expedia deal was found by Cheapflights users on 7/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/222:58 pm
ONT
- SEA
1 stop19h 02m
Frontier
Sun 9/277:00 pm
SEA
- ONT
1 stop21h 10m
Frontier
Deal found 7/18![Frontier logo]()
$552
This Alaska Airlines deal was found by Cheapflights users on 7/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:47 am
ONT
- SEA
1 stop5h 12m
Alaska Airlines
Mon 9/148:23 am
SEA
- ONT
Nonstop2h 53m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$597
This Alaska Airlines deal was found by Cheapflights users on 7/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:12 am
ONT
- SEA
1 stop5h 38m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 7/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:14 pm
ONT
- SEA
1 stop4h 25m
Alaska Airlines
Deal found 7/18![Alaska Airlines logo]()
$349
This Alaska Airlines deal was found by Cheapflights users on 7/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:02 am
ONT
- SEA
Nonstop2h 42m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$354
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:50 pm
ONT
- SEA
2 stops16h 58m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:50 pm
ONT
- SEA
2 stops5h 49m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:50 pm
ONT
- SEA
2 stops5h 49m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$377
One-way business class flights to SeattleSearch for one-way business class flight options to Seattle. Find affordable one-way fares based on user searches. Data last updated July 20, 2026.
Search for one-way business class flight options to Seattle. Find affordable one-way fares based on user searches. Data last updated July 20, 2026.
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:05 pm
ONT
- SEA
Nonstop2h 56m
Frontier
Deal found 7/19![Frontier logo]()
$249
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:09 pm
ONT
- SEA
Nonstop2h 49m
Frontier
Deal found 7/19![Frontier logo]()
$254
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:12 pm
ONT
- SEA
Nonstop2h 43m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$299
This Alaska Airlines deal was found by Cheapflights users on 7/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:12 am
ONT
- SEA
1 stop5h 38m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:02 am
ONT
- SEA
Nonstop2h 43m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$319
This American Airlines deal was found by Cheapflights users on 7/19. 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 9/171:04 pm
ONT
- SEA
1 stop7h 25m
American Airlines
Deal found 7/19![American Airlines logo]()
$329
Quickest business class flights to SeattleExplore quickest business class flight options to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated July 20, 2026.
Explore quickest business class flight options to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated July 20, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:02 am
ONT
- SEA
Nonstop2h 43m
Alaska Airlines
Wed 9/308:23 am
SEA
- ONT
Nonstop2h 53m
Alaska Airlines
Deal found 7/17![Alaska Airlines logo]()
$547
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:02 am
ONT
- SEA
Nonstop2h 47m
Alaska Airlines
Tue 10/207:30 am
SEA
- ONT
Nonstop2h 47m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$537
This Expedia deal was found by Cheapflights users on 7/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/84:09 pm
ONT
- SEA
Nonstop2h 49m
Frontier
Tue 8/118:13 pm
SEA
- ONT
1 stop11h 50m
Frontier
Deal found 7/15![Frontier logo]()
$518
This Expedia deal was found by Cheapflights users on 7/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:05 pm
ONT
- SEA
Nonstop2h 56m
Frontier
Sun 9/2711:15 am
SEA
- ONT
Nonstop2h 48m
Frontier
Deal found 7/18![Frontier logo]()
$401
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:05 pm
ONT
- SEA
Nonstop2h 56m
Frontier
Fri 9/1811:15 am
SEA
- ONT
Nonstop2h 48m
Frontier
Deal found 7/19![Frontier logo]()
$451
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:17 pm
ONT
- SEA
1 stop12h 22m
Frontier
Sat 9/1211:15 am
SEA
- ONT
Nonstop2h 48m
Frontier
Deal found 7/19![Frontier logo]()
$476
This Alaska Airlines deal was found by Cheapflights users on 7/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:02 am
ONT
- SEA
Nonstop2h 42m
Alaska Airlines
Deal found 7/16![Alaska Airlines logo]()
$354
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:12 pm
ONT
- SEA
Nonstop2h 43m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$299
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:02 am
ONT
- SEA
Nonstop2h 43m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$319
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:09 pm
ONT
- SEA
Nonstop2h 49m
Frontier
Deal found 7/19![Frontier logo]()
$254
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:05 pm
ONT
- SEA
Nonstop2h 56m
Frontier
Deal found 7/19![Frontier logo]()
$249
This Alaska Airlines deal was found by Cheapflights users on 7/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:14 pm
ONT
- SEA
1 stop4h 25m
Alaska Airlines
Deal found 7/19![Alaska Airlines logo]()
$349
Travel insights for business class flights from Ontario to Seattle
Get recent, data-driven insights about business class flights from Ontario to Seattle including ideal travel times, pricing trends, and more.
Frequently Asked Questions about Ontario to Seattle Business Class flights
Find answers to common questions related to Business Class tickets for flights to Seattle. Get information on booking, amenities, upgrade options, and more. This FAQ section was last updated on July 20, 2026.
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