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$434+ Cheap flights from Seattle (SEA) to Hangzhou (HGH)

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HGH
Mar 11 — Mar 181
Wed 3/11
Wed 3/18
1 adult, Economy
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Cheap flight deals from Seattle to Hangzhou

Cheapest flights from Seattle to Hangzhou
Explore the most affordable flight options available from Seattle to Hangzhou. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 9, 2026.

This Cathay Pacific deal was found by Cheapflights users on 2/8. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/611:45 am
SEA
-
HGH
1 stop19h 50m
Cathay Pacific
Thu 4/98:00 am
HGH
-
SEA
1 stop17h 05m
Cathay Pacific
Deal found 2/8$706
This oojo deal was found by Cheapflights users on 2/7. 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 3/246:25 am
SEA
-
HGH
2 stops25h 05m
Cathay Pacific
Tue 3/313:55 pm
HGH
-
SEA
1 stop33h 10m
Cathay Pacific
Deal found 2/7$755
This oojo deal was found by Cheapflights users on 2/8. 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 3/266:25 am
SEA
-
HGH
2 stops41h 45m
Cathay Pacific
Thu 4/28:00 am
HGH
-
SEA
1 stop17h 05m
Cathay Pacific
Deal found 2/8$770
This oojo deal was found by Cheapflights users on 2/7. 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 3/43:50 pm
SEA
-
HGH
2 stops26h 20m
Cathay Pacific
Wed 3/188:00 am
HGH
-
SEA
2 stops22h 42m
Cathay Pacific
Deal found 2/7$853
This FlightHub deal was found by Cheapflights users on 2/7. 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 3/212:10 am
SEA
-
HGH
1 stop21h 35m
Asiana Airlines
Wed 3/183:05 pm
HGH
-
SEA
1 stop14h 50m
Asiana Airlines
Deal found 2/7$855
This FlightHub deal was found by Cheapflights users on 2/8. 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 3/188:41 am
SEA
-
HGH
2 stops22h 49m
Cathay Pacific
Tue 3/243:45 pm
HGH
-
SEA
2 stops21h 57m
Cathay Pacific
Deal found 2/8$861
This Trip.com deal was found by Cheapflights users on 2/7. 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 3/2411:00 am
SEA
-
HGH
1 stop17h 55m
Hainan Airlines
Tue 3/317:25 am
HGH
-
SEA
1 stop16h 35m
Hainan Airlines
Deal found 2/7$868
This oojo deal was found by Cheapflights users on 2/8. 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 3/1911:05 am
SEA
-
HGH
2 stops33h 20m
Hainan Airlines
Tue 3/248:30 am
HGH
-
SEA
1 stop15h 30m
Hainan Airlines
Deal found 2/8$894
This Korean Air deal was found by Cheapflights users on 2/7. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:00 am
SEA
-
HGH
1 stop34h 30m
Korean Air
Wed 3/1812:05 pm
HGH
-
SEA
2 stops22h 54m
Korean Air
Deal found 2/7$917
This FlightHub deal was found by Cheapflights users on 2/6. 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.
Sun 2/1511:45 pm
SEA
-
HGH
2 stops31h 15m
Multiple Airlines
Sun 3/110:00 pm
HGH
-
SEA
2 stops57h 05m
Multiple Airlines
Deal found 2/6$934

Find flight deals from Seattle to Hangzhou

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Hangzhou (HGH). 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 February 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$706
(Cathay Pacific)

One-way from

$434
(Kiwi.com)
Provider with most accurate pricing for Seattle/Tacoma Intl-Hangzhou flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Hangzhou flights.
Search Deals
From Seattle/Tacoma Intl to Hangzhou
Search Deals
One-way flight from Seattle/Tacoma Intl to Hangzhou
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Hangzhou 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 February 9, 2026.
Use the filters below to find and compare flights from Seattle to Hangzhou that are best for you.

Fly from

Seattle

Fly to

Hangzhou

Route

Depart

Return

Price

SeattleHangzhou

SEA - HGH

SEAHGH

Seattle/Tacoma Intl

Mon 4/6

11:45 am-10:35 pm

1 stop19h 50m

Hangzhou

Thu 4/9

8:00 am-10:05 am

1 stop17h 05m

$706

SeattleHangzhou

SEA - HGH

SEAHGH

Seattle/Tacoma Intl

Tue 3/24

6:25 am-10:30 pm

2 stops25h 05m

Hangzhou

Tue 3/31

3:55 pm-10:05 am

1 stop33h 10m

$755

SeattleHangzhou

SEA - HGH

SEAHGH

Seattle/Tacoma Intl

Wed 3/4

3:50 pm-10:10 am

2 stops26h 20m

Hangzhou

Wed 3/18

8:00 am-3:42 pm

2 stops22h 42m

$853

SeattleHangzhou

SEA - HGH

SEAHGH

Seattle/Tacoma Intl

Mon 3/2

12:10 am-1:45 pm

1 stop21h 35m

Hangzhou

Wed 3/18

3:05 pm-2:55 pm

1 stop14h 50m

$855

SeattleHangzhou

SEA - HGH

SEAHGH

Seattle/Tacoma Intl

Mon 3/9

12:10 am-11:45 pm

2 stops56h 35m

$434

SeattleHangzhou

SEA - HGH

SEAHGH

Seattle/Tacoma Intl

Mon 3/9

12:10 am-1:45 pm

1 stop22h 35m

$533

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

  • Most accurate provider: When it comes to deals on Seattle-Hangzhou flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Hangzhou flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Hangzhou flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Hangzhou 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-Hangzhou 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 Hangzhou

Have a flexible travel schedule? Discover the best time to fly to Hangzhou from Seattle 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 Seattle to Hangzhou

What is the cheapest month to book a flight from Seattle to Hangzhou?

Currently, March is the cheapest month in which you can book a flight from Seattle to Hangzhou (average of $435). Flying from Seattle to Hangzhou in July is currently the most expensive (average of $1,132). 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.

Reviews of airlines servicing Hangzhou

Get insights into the airlines that provide service to Hangzhou. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Hangzhou. Reviews last updated February 9, 2026.
Read reviews from past customers who have flown Hainan Airlines and Cathay Pacific from Seattle to Hangzhou. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Hainan Airlines
8.2
Very good
62 reviews

Comfort

8.1

Boarding

8.5

Entertainment

7.7

Crew

8.9

Overall

8.2

Food

8.3

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
Hainan Airlines
8.2
Very good
62 reviews
Hainan Airlines
8.2
Very good
62 reviews

Comfort

8.1

Boarding

8.5

Entertainment

7.7

Crew

8.9

Overall

8.2

Food

8.3

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.
Cathay Pacific
7.6
Good
1,160 reviews
Hainan Airlines
8.2
Very good
62 reviews

Comfort

8.1

Boarding

8.5

Entertainment

7.7

Crew

8.9

Overall

8.2

Food

8.3

Reviews

1 / 2
10.0
Excellent

Anonymous,Mar 2025

CAN - PEK

Excellent services. The staff were amazing. Although if there was something that I could suggest to improve the services I’d say that snacks and drinks should be offered in between meals. Other than that then it was a lovely flight.

Related info for your journey

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

  • How long is the flight from Seattle to Hangzhou?

    For as low as $706, Cathay Pacific can have you in Hangzhou from Seattle in 19h 50m. The distance from Seattle to Hangzhou is about 5805 mi.

  • What are the cheapest airlines flying from Seattle to Hangzhou round-trip?

    Flying on Hainan Airlines is currently your cheapest option to Hangzhou, with prices starting at $843. Another option worth looking into is Cathay Pacific, starting at $872 round trip.

  • Can I find deals for flights from Seattle to Hangzhou that include hotel bookings?

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

  • How can I find direct flights from Seattle to Hangzhou?

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

  • Can I find deals for business class flights from Seattle to Hangzhou?

    Yes. Cheapflights offers flight deals from Seattle to Hangzhou 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 Seattle to Hangzhou?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Hangzhou (average of $435). Flying from Seattle to Hangzhou in July is currently the most expensive (average of $1,132). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Complete your trip

Complete your trip to Hangzhou by adding a car rental and/or hotel reservation to your travel itinerary.
Hangzhou car rentals
Shanghai Hongqiao Intl Airport car rentals
Hangzhou Airport car rentals

Top 2 airlines flying from Seattle to Hangzhou

Discover the top 2 airlines that operate flights from Seattle to Hangzhou. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hainan AirlinesCheapest$843Average$974FlexibilityNo cancel feeOn-time61%
Cathay PacificCheapest$872Average$887FlexibilityNo cancel feeOn-time72%

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