$251+ Cheap flights from Seattle (SEA) to Hamilton, ON (YHM)
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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YHM
Nov 23 — Nov 301
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Hamilton 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 Seattle to Hamilton
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Cheapest flights from Seattle to HamiltonExplore the most affordable flight options available from Seattle to Hamilton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 24, 2026.
Explore the most affordable flight options available from Seattle to Hamilton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 24, 2026.
This FlightHub deal was found by Cheapflights users on 10/23. 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.
Wed 11/182:30 pm -
1 stop20h 55m
Thu 11/263:25 pm -
1 stop25h 15m
Deal found 10/23![WestJet logo]()
$573
This flugladen.de deal was found by Cheapflights users on 10/23. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/282:20 pm -
1 stop21h 05m
Sat 12/57:05 am -
1 stop8h 56m
Deal found 10/23![Multiple Airlines logo]()
$652
This Mytrip deal was found by Cheapflights users on 10/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:30 pm -
1 stop20h 55m
Mon 11/238:00 am -
1 stop8h 40m
Deal found 10/19![Multiple Airlines logo]()
$654
This oojo deal was found by Cheapflights users on 10/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:20 pm -
1 stop21h 05m
Sun 12/133:25 pm -
1 stop25h 15m
Deal found 10/24![WestJet logo]()
$655
This oojo deal was found by Cheapflights users on 10/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:20 pm -
1 stop21h 05m
Tue 12/13:25 pm -
1 stop25h 15m
Deal found 10/24![WestJet logo]()
$668
This oojo deal was found by Cheapflights users on 10/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:30 pm -
1 stop20h 55m
Thu 11/193:25 pm -
1 stop25h 15m
Deal found 10/22![WestJet logo]()
$670
This Flightnetwork deal was found by Cheapflights users on 10/19. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:40 am -
2 stops10h 30m
Thu 12/106:05 am -
2 stops15h 17m
Deal found 10/19![Multiple Airlines logo]()
$691
Best flights from Seattle to HamiltonDiscover carefully curated flight deals from Seattle to Hamilton that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.
Discover carefully curated flight deals from Seattle to Hamilton that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.
This Mytrip deal was found by Cheapflights users on 10/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:30 pm -
1 stop20h 55m
Mon 11/234:05 pm -
3 stops24h 35m
Deal found 10/19![Multiple Airlines logo]()
$664
This oojo deal was found by Cheapflights users on 10/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:20 pm -
1 stop21h 05m
Tue 12/13:25 pm -
1 stop25h 15m
Deal found 10/24![WestJet logo]()
$668
This oojo deal was found by Cheapflights users on 10/23. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:30 pm -
1 stop20h 55m
Thu 11/193:25 pm -
1 stop25h 15m
Deal found 10/23![WestJet logo]()
$670
This Flightnetwork deal was found by Cheapflights users on 10/19. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:40 am -
2 stops10h 30m
Thu 12/106:05 am -
2 stops15h 17m
Deal found 10/19![Multiple Airlines logo]()
$691
This Gotogate deal was found by Cheapflights users on 10/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:30 pm -
1 stop20h 55m
Sat 11/147:05 am -
1 stop8h 52m
Deal found 10/19![Multiple Airlines logo]()
$710
This Gotogate deal was found by Cheapflights users on 10/23. 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.
Sat 11/212:20 pm -
1 stop21h 05m
Sun 11/297:05 am -
1 stop10h 37m
Deal found 10/23![Multiple Airlines logo]()
$714
This Mytrip deal was found by Cheapflights users on 10/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/172:30 pm -
2 stops30h 38m
Tue 11/246:05 am -
3 stops34h 35m
Deal found 10/19![Multiple Airlines logo]()
$799
This Mytrip deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/610:10 am -
1 stop10h 55m
Sun 12/136:05 am -
2 stops15h 17m
Deal found 10/22![Multiple Airlines logo]()
$811
This Mytrip deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/288:40 am -
1 stop8h 13m
Sat 12/56:05 am -
2 stops15h 17m
Deal found 10/21![Multiple Airlines logo]()
$828
Last-minute flights from Seattle to HamiltonDiscover last-minute flight deals from Seattle to Hamilton. Data last updated October 24, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Hamilton. Data last updated October 24, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 10/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:30 pm -
1 stop20h 55m
Sat 11/147:05 am -
1 stop8h 52m
Deal found 10/19![Multiple Airlines logo]()
$710
This Mytrip deal was found by Cheapflights users on 10/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:30 pm -
1 stop20h 55m
Mon 11/238:00 am -
1 stop8h 40m
Deal found 10/19![Multiple Airlines logo]()
$654
This oojo deal was found by Cheapflights users on 10/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:30 pm -
1 stop20h 55m
Thu 11/193:25 pm -
1 stop25h 15m
Deal found 10/22![WestJet logo]()
$670
This FlightHub deal was found by Cheapflights users on 10/23. 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.
Wed 11/182:30 pm -
1 stop20h 55m
Thu 11/263:25 pm -
1 stop25h 15m
Deal found 10/23![WestJet logo]()
$573
This oojo deal was found by Cheapflights users on 10/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:20 pm -
1 stop21h 05m
Tue 12/13:25 pm -
1 stop25h 15m
Deal found 10/24![WestJet logo]()
$668
This Mytrip deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/212:20 pm -
1 stop21h 05m
Sat 11/286:05 am -
2 stops11h 37m
Deal found 10/24![Multiple Airlines logo]()
$696
This flugladen.de deal was found by Cheapflights users on 10/23. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/282:20 pm -
1 stop21h 05m
Sat 12/57:05 am -
1 stop8h 56m
Deal found 10/23![Multiple Airlines logo]()
$652
One-way flights from Seattle to HamiltonSearch for one-way flight options from Seattle to Hamilton. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.
Search for one-way flight options from Seattle to Hamilton. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.
This Justfly.com deal was found by Cheapflights users on 10/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:30 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![WestJet logo]()
$251
This FlightHub deal was found by Cheapflights users on 10/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/132:30 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![WestJet logo]()
$253
This FlightHub deal was found by Cheapflights users on 10/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/72:30 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![WestJet logo]()
$254
This FlightHub deal was found by Cheapflights users on 10/20. 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.
Mon 11/232:30 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![WestJet logo]()
$255
This Justfly.com deal was found by Cheapflights users on 10/21. 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.
Mon 11/302:30 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![WestJet logo]()
$278
This FlightHub deal was found by Cheapflights users on 10/21. 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.
Wed 11/182:30 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![WestJet logo]()
$283
This FlightHub deal was found by Cheapflights users on 10/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/62:30 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![WestJet logo]()
$289
This Mytrip deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:20 pm -
1 stop21h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![WestJet logo]()
$298
This FlightHub deal was found by Cheapflights users on 10/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/212:30 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![WestJet logo]()
$301
This FlightHub deal was found by Cheapflights users on 10/24. 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.
Sat 11/212:20 pm -
1 stop21h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![WestJet logo]()
$304
Find flight deals from Seattle to Hamilton
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Hamilton (YHM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $573 (FlightHub) |
One-way from | $251 (Justfly.com) |
Popular in | July |
Cheapest in | January |
Average price | $603 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Hamilton 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 24, 2026.
Use the filters below to find and compare flights from Seattle to Hamilton that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Mon 11/2
2:30 pm-2:25 pm
1 stop20h 55m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$251
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Mon 11/23
2:30 pm-2:25 pm
1 stop20h 55m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$255
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Mon 11/30
2:30 pm-2:25 pm
1 stop20h 55m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$278
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sat 12/5
2:20 pm-2:25 pm
1 stop21h 05m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$298
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sat 11/21
2:20 pm-2:25 pm
1 stop21h 05m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$304
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sun 12/13
3:48 pm-12:05 am
1 stop29h 17m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$352
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Thu 12/3
9:34 pm-12:05 am
1 stop23h 31m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$364
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Wed 10/28
3:30 pm-3:25 pm
1 stop20h 55m
Hamilton
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$377
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Mon 11/16
2:30 pm-2:25 pm
1 stop20h 55m
Hamilton
Mon 11/23
4:05 pm-1:40 pm
3 stops24h 35m
$664
SeattleHamilton
SEA Seattle/Tacoma Intl - YHM Hamilton
SEAYHM
Seattle/Tacoma Intl
Sat 11/21
2:20 pm-2:25 pm
1 stop21h 05m
Hamilton
Tue 12/1
3:25 pm-1:40 pm
1 stop25h 15m
$668
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from Seattle to Hamilton
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Hamilton in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Hamilton, Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Hamilton, Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Hamilton, Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Hamilton, Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Hamilton, Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Seattle to Hamilton
Have a flexible travel schedule? Discover the best time to fly to Hamilton from Seattle with our price prediction graph.
SEA-YHM
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.
Related info for your journey
Find useful and relevant information for your journey from Seattle to Hamilton. 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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