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$129+ 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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YHM
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This oojo deal was found by Cheapflights users on 1/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:10 pm
SEA
-
YHM
1 stop23h 06m
WestJet
Mon 4/276:10 pm
YHM
-
SEA
1 stop18h 30m
WestJet
Deal found 1/29$314
This oojo deal was found by Cheapflights users on 1/26. 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.
Thu 5/147:35 pm
SEA
-
YHM
1 stop18h 40m
WestJet
Mon 5/186:10 pm
YHM
-
SEA
1 stop18h 30m
WestJet
Deal found 1/26$315
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:30 am
SEA
-
YHM
1 stop27h 45m
WestJet
Sun 5/36:10 pm
YHM
-
SEA
1 stop27h 35m
WestJet
Deal found 1/28$316
This oojo deal was found by Cheapflights users on 1/26. 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 5/27:35 pm
SEA
-
YHM
1 stop18h 40m
WestJet
Sun 5/106:10 pm
YHM
-
SEA
1 stop27h 35m
WestJet
Deal found 1/26$332
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/173:10 pm
SEA
-
YHM
1 stop23h 06m
WestJet
Tue 4/75:50 am
YHM
-
SEA
1 stop11h 29m
WestJet
Deal found 1/28$333
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:10 pm
SEA
-
YHM
1 stop23h 06m
WestJet
Wed 3/46:10 pm
YHM
-
SEA
1 stop23h 09m
WestJet
Deal found 1/28$338
This Booking.com deal was found by Cheapflights users on 1/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2810:05 am
SEA
-
YHM
1 stop10h 30m
Multiple Airlines
Sat 3/78:15 am
YHM
-
SEA
1 stop14h 01m
Multiple Airlines
Deal found 1/27$412
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/103:10 pm
SEA
-
YHM
1 stop23h 06m
WestJet
Wed 2/186:10 pm
YHM
-
SEA
1 stop23h 09m
WestJet
Deal found 1/28$426
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/143:20 pm
SEA
-
YHM
1 stop22h 56m
WestJet
Tue 5/196:10 pm
YHM
-
SEA
1 stop18h 30m
WestJet
Deal found 1/28$435
This Trip.com deal was found by Cheapflights users on 1/26. 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 6/210:30 am
SEA
-
YHM
1 stop9h 43m
Multiple Airlines
Mon 6/86:10 pm
YHM
-
SEA
1 stop27h 35m
Multiple Airlines
Deal found 1/26$438
This Expedia deal was found by Cheapflights users on 1/26. 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 4/46:00 am
GEG
-
YHM
2 stops10h 00m
Multiple Airlines
Tue 4/78:15 am
YHM
-
GEG
2 stops18h 44m
Multiple Airlines
Deal found 1/26$770
This Travelocity deal was found by Cheapflights users on 1/28. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:10 am
GEG
-
YHM
2 stops12h 25m
Multiple Airlines
Tue 2/245:50 am
YHM
-
GEG
2 stops15h 55m
Multiple Airlines
Deal found 1/28$898

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$314
(oojo)

One-way from

$129
(oojo)

Popular in

June

Cheapest in

January

Average price

$269
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
Highest demand for flights based on searches. 16% potential increase in price ($72 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

Wed 4/22

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Mon 4/27

6:10 pm-9:40 am

1 stop18h 30m

$314

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 5/14

7:35 pm-5:15 pm

1 stop18h 40m

Hamilton

Mon 5/18

6:10 pm-9:40 am

1 stop18h 30m

$315

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Sat 5/2

7:35 pm-5:15 pm

1 stop18h 40m

Hamilton

Sun 5/10

6:10 pm-6:45 pm

1 stop27h 35m

$332

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 4/7

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Mon 4/13

6:10 pm-2:19 pm

1 stop23h 09m

$333

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 3/24

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Tue 5/19

6:10 pm-9:40 am

1 stop18h 30m

$333

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 5/12

7:35 pm-5:15 pm

1 stop18h 40m

Hamilton

Sun 5/17

6:10 pm-9:40 am

1 stop18h 30m

$333

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 3/17

3:10 pm-5:16 pm

1 stop23h 06m

Hamilton

Tue 4/7

5:50 am-2:19 pm

1 stop11h 29m

$333

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Sat 5/2

7:35 pm-5:15 pm

1 stop18h 40m

Hamilton

Sat 5/9

6:10 pm-9:40 am

1 stop18h 30m

$333

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Sat 2/28

10:05 am-11:35 pm

1 stop10h 30m

Hamilton

Sat 3/7

8:15 am-7:16 pm

1 stop14h 01m

$412

SpokaneHamilton

GEG - YHM

GEGYHM

Spokane

Sat 4/4

6:00 am-7:00 pm

2 stops10h 00m

Hamilton

Tue 4/7

8:15 am-11:59 pm

2 stops18h 44m

$770

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 26 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, April is the cheapest month in which you can book a flight from State of Washington to Hamilton, Ontario (average of $125). Flying from State of Washington to Hamilton, Ontario in December is currently the most expensive (average of $281). 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 $314. 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, April is the cheapest month in which you can book a flight from State of Washington to Hamilton, Ontario (average of $125). Flying from State of Washington to Hamilton, Ontario in December is currently the most expensive (average of $281). 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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