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$123+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YHM
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Washington to Hamilton

Keep the following information in mind while searching for Washington to Hamilton flight deals. Data was last updated October 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$295
(oojo)

One-way from

$123
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$442
Provider with most accurate pricing for Seattle/Tacoma Intl-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Toronto (YTO) flights.
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From Washington to Hamilton
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One-way flight from Washington to Hamilton
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Highest demand for flights based on searches. 14% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 30, 2025.

This Mytrip deal was found by Cheapflights users on 10/30. 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 11/295:50 amSEA - YHM
1 stop10h 10mMultiple Airlines
Sat 12/68:15 amYHM - SEA
1 stop9h 16mMultiple Airlines
Deal found 10/30$352
This Orbitz deal was found by Cheapflights users on 10/27. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/298:12 amSEA - YHM
1 stop12h 35mMultiple Airlines
Tue 12/28:15 amYHM - SEA
1 stop9h 26mMultiple Airlines
Deal found 10/27$534
This Mytrip deal was found by Cheapflights users on 10/28. 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 12/110:55 pmSEA - YHM
1 stop17h 05mMultiple Airlines
Fri 12/58:15 amYHM - SEA
1 stop15h 35mMultiple Airlines
Deal found 10/28$563
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Thu 11/2710:55 pmSEA - YHM
1 stop17h 05mMultiple Airlines
Thu 12/48:15 amYHM - SEA
1 stop15h 35mMultiple Airlines
Deal found 10/28$564
This oojo deal was found by Cheapflights users on 10/30. 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 12/33:15 pmSEA - YHM
1 stop23h 02mWestJet
Wed 12/106:10 pmYHM - SEA
1 stop23h 10mWestJet
Deal found 10/30$584
This Expedia deal was found by Cheapflights users on 10/29. 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 11/288:12 amSEA - YHM
1 stop12h 35mMultiple Airlines
Sat 11/298:15 amYHM - SEA
1 stop13h 31mMultiple Airlines
Deal found 10/29$591
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/1910:55 pmSEA - YHM
1 stop17h 05mMultiple Airlines
Sun 11/308:15 amYHM - SEA
1 stop11h 31mMultiple Airlines
Deal found 10/29$594
This Orbitz deal was found by Cheapflights users on 10/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:12 amSEA - YHM
1 stop12h 35mMultiple Airlines
Mon 12/18:15 amYHM - SEA
1 stop13h 31mMultiple Airlines
Deal found 10/28$615
This Expedia deal was found by Cheapflights users on 10/29. 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 11/238:12 amSEA - YHM
1 stop12h 35mMultiple Airlines
Sat 11/298:15 amYHM - SEA
1 stop13h 31mMultiple Airlines
Deal found 10/29$616
This Travelocity deal was found by Cheapflights users on 10/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/218:12 amSEA - YHM
1 stop12h 35mMultiple Airlines
Mon 11/248:15 amYHM - SEA
1 stop9h 24mMultiple Airlines
Deal found 10/30$634
This WestJet deal was found by Cheapflights users on 10/30. 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.
Sun 12/141:10 pmGEG - YHM
2 stops25h 07mWestJet
Sun 12/216:10 pmYHM - GEG
2 stops27h 33mWestJet
Deal found 10/30$1,894

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 October 30, 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 4/14

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Sun 4/19

6:10 pm-2:19 pm

1 stop23h 09m

$295

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 1/15

3:10 pm-1:22 pm

1 stop19h 12m

Hamilton

Mon 1/19

6:10 pm-2:20 pm

1 stop23h 10m

$295

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 2/17

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Thu 2/26

6:10 pm-2:19 pm

1 stop23h 09m

$295

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 1/8

3:10 pm-1:22 pm

1 stop19h 12m

Hamilton

Sun 1/11

6:10 pm-2:20 pm

1 stop23h 10m

$295

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 1/15

3:10 pm-1:22 pm

1 stop19h 12m

Hamilton

Sun 1/18

6:10 pm-2:20 pm

1 stop23h 10m

$295

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Sat 11/29

5:50 am-7:00 pm

1 stop10h 10m

Hamilton

Sat 12/6

8:15 am-2:31 pm

1 stop9h 16m

$352

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Wed 3/18

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Sat 3/21

8:15 am-10:21 am

2 stops29h 06m

$414

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 4/9

3:10 pm-1:21 pm

1 stop19h 11m

Hamilton

Sun 4/12

6:10 pm-10:21 am

2 stops19h 11m

$414

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Sun 1/11

8:32 am-10:18 pm

1 stop10h 46m

Hamilton

Sat 1/17

8:15 am-2:34 pm

1 stop9h 19m

$514

SpokaneHamilton

GEG - YHM

GEGYHM

Spokane

Sun 12/14

1:10 pm-5:17 pm

2 stops25h 07m

Hamilton

Sun 12/21

6:10 pm-6:43 pm

2 stops27h 33m

$1,894

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 19 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 $271). 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 06m. WestJet provides one of the quickest options available for as low as $295. 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 $271). 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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