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$125+ Cheap flights from Washington to Hamilton, ON (YHM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YHM
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Washington to Hamilton

Cheapest flights from Washington to Hamilton
Explore the most affordable flight options available from Washington to Hamilton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This oojo deal was found by Cheapflights users on 12/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:10 pmSEA - YHM
1 stop23h 07mWestJet
Wed 1/76:10 pmYHM - SEA
1 stop23h 10mWestJet
Deal found 12/13$949
This FlightHub deal was found by Cheapflights users on 12/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/163:10 pmSEA - YHM
1 stop23h 07mWestJet
Tue 12/235:45 amYHM - SEA
2 stops28h 35mWestJet
Deal found 12/13$963
This oojo deal was found by Cheapflights users on 12/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/163:10 pmSEA - YHM
1 stop23h 07mWestJet
Mon 1/126:10 pmYHM - SEA
1 stop23h 10mWestJet
Deal found 12/13$1,085
This oojo deal was found by Cheapflights users on 12/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:10 pmSEA - YHM
1 stop23h 07mWestJet
Sun 1/46:10 pmYHM - SEA
1 stop23h 10mWestJet
Deal found 12/13$1,113
This WestJet deal was found by Cheapflights users on 12/13. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:25 amSEA - YHM
2 stops24h 57mWestJet
Sun 12/286:10 pmYHM - SEA
2 stops16h 10mWestJet
Deal found 12/13$1,122
This WestJet deal was found by Cheapflights users on 12/12. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:45 pmSEA - YHM
2 stops18h 32mWestJet
Sun 1/46:10 pmYHM - SEA
1 stop23h 10mWestJet
Deal found 12/12$1,220
This Mytrip deal was found by Cheapflights users on 12/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:10 pmSEA - YHM
2 stops24h 50mMultiple Airlines
Sun 1/48:15 amYHM - SEA
2 stops29h 07mMultiple Airlines
Deal found 12/13$1,247
This oojo deal was found by Cheapflights users on 12/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/273:20 pmSEA - YHM
1 stop22h 57mWestJet
Tue 1/65:45 amYHM - SEA
1 stop11h 35mWestJet
Deal found 12/14$1,307
This oojo deal was found by Cheapflights users on 12/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:10 pmSEA - YHM
1 stop23h 07mWestJet
Wed 12/316:10 pmYHM - SEA
1 stop23h 10mWestJet
Deal found 12/13$1,338
This Trip.com deal was found by Cheapflights users on 12/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:10 pmSEA - YHM
1 stop23h 07mMultiple Airlines
Tue 12/305:45 amYHM - SEA
1 stop9h 38mMultiple Airlines
Deal found 12/14$1,365
This Booking.com deal was found by Cheapflights users on 12/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/163:10 pmSEA - YHM
1 stop23h 07mWestJet
Thu 12/186:10 pmYHM - SEA
1 stop23h 10mWestJet
Deal found 12/14$1,393

Find flight deals from Washington to Hamilton

Keep the following information in mind while searching for Washington to Hamilton flight deals. Data was last updated December 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$271
(Trip.com)

One-way from

$125
(Trip.com)

Popular in

December

Cheapest in

November

Average price

$553
Provider with most accurate pricing for Seattle/Tacoma Intl-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Toronto (YTO) flights.
Search Deals
From Washington to Hamilton
Search Deals
One-way flight from Washington to Hamilton
Search Deals
High demand for flights, 6% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Washington to Hamilton that are best for you.

Fly from

Washington

Fly to

Hamilton

Route

Depart

Return

Price

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 1/27

3:10 pm-5:17 pm

1 stop23h 07m

Hamilton

Tue 2/3

5:50 am-2:19 pm

1 stop11h 29m

$285

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 1/8

3:10 pm-1:22 pm

1 stop19h 12m

Hamilton

Mon 1/12

6:10 pm-2:20 pm

1 stop23h 10m

$292

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Mon 5/4

7:05 am-12:40 am

1 stop14h 35m

Hamilton

Mon 5/11

6:00 am-8:28 pm

1 stop17h 28m

$295

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Wed 4/15

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Fri 5/8

6:00 am-8:28 pm

1 stop17h 28m

$295

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 4/9

3:10 pm-1:21 pm

1 stop19h 11m

Hamilton

Thu 4/16

6:10 pm-2:19 pm

1 stop23h 09m

$296

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Wed 4/8

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Sun 4/12

6:10 pm-2:19 pm

1 stop23h 09m

$296

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 1/29

5:50 am-7:00 pm

1 stop10h 10m

Hamilton

Thu 2/5

8:15 am-2:31 pm

1 stop9h 16m

$375

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Sat 1/10

3:20 pm-5:17 pm

1 stop22h 57m

Hamilton

Wed 1/14

6:10 pm-2:20 pm

1 stop23h 10m

$446

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Fri 1/9

8:32 am-10:18 pm

1 stop10h 46m

Hamilton

Sun 1/11

8:15 am-2:34 pm

1 stop9h 19m

$490

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 1/8

8:32 am-10:18 pm

1 stop10h 46m

Hamilton

Sat 1/10

8:15 am-2:34 pm

1 stop9h 19m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 21 results
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Best time to book a flight from Washington to Hamilton

Have a flexible travel schedule? Discover the best time to fly to Hamilton from Washington with our price prediction graph.
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 to Hamilton

What is the cheapest month to book a flight from State of Washington to Hamilton, Ontario?

Currently, March is the cheapest month in which you can book a flight from State of Washington to Hamilton, Ontario (average of $121). Flying from State of Washington to Hamilton, Ontario in May is currently the most expensive (average of $272). 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.

Related info for your journey

Find useful and relevant information for your journey from Washington to Hamilton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Hamilton from Washington?

    Hamilton (YHM), located 6.8 mi from the city center, is the airport you fly into when you book flights from Washington to Hamilton.

  • How long is the flight from State of Washington to Hamilton, Ontario?

    A quick flight from State of Washington to Hamilton, Ontario can take about 23h 07m. WestJet provides one of the quickest options available for as low as $285. There are 2053 mi between State of Washington and Hamilton, Ontario.

  • Can I find deals for flights from Washington to Hamilton that include hotel bookings?

    Yes. In addition to deals on Washington to Hamilton flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Hamilton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Hamilton.

  • Can I find deals for business class flights from Washington to Hamilton?

    Yes. Cheapflights offers flight deals from Washington to Hamilton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Hamilton, Ontario?

    Currently, March is the cheapest month in which you can book a flight from State of Washington to Hamilton, Ontario (average of $121). Flying from State of Washington to Hamilton, Ontario in May is currently the most expensive (average of $272). 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.

See more FAQs

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Alternative routes for Washington to Hamilton

See prices for flight routes from nearby airports that may be better suited for you.
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