In terms of precipitation, rainfall in Hainan ranges from 0.8 - 10.6 inches per month. September is typically the wettest month, when rainfall can reach 10.6 in. January is typically the driest time to visit Hainan when rainfall is around 0.8 in.

If weather is an important factor for your trip to Hainan, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

What is the cheapest time of day to fly from SEA to HA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Hainan as you normally would.

What airport do you fly from for flights from Seattle to Hainan?

Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Hainan. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

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

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

How can I find direct flights from Seattle to Hainan?

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

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

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

$1,037+ Flights from Seattle to Hainan

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Cheap flight deals from Seattle to Hainan

Cheapest flights from Seattle to Hainan
Explore the most affordable flight options available from Seattle to Hainan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Thu 12/255:50 amSEA - SYX

2 stops37h 10mMultiple Airlines

Sat 1/1011:15 pmSYX - SEA

2 stops30h 05mMultiple Airlines

Deal found 12/15

$4,348

Best flights from Seattle to Hainan
Discover carefully curated flight deals from Seattle to Hainan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.

Mon 1/511:28 amSEA - SYX

2 stops31h 32mMultiple Airlines

Tue 1/135:25 pmSYX - SEA

2 stops33h 56mMultiple Airlines

Deal found 12/16

$1,037

Mon 1/59:06 amSEA - SYX

2 stops36h 19mAir China

Fri 1/168:30 pmSYX - SEA

2 stops35h 14mAir China

Deal found 12/16

$1,699

Mon 1/57:09 amSEA - SYX

2 stops24h 21mMultiple Airlines

Wed 1/149:20 pmSYX - SEA

2 stops36h 32mMultiple Airlines

Deal found 12/16

$1,046

Fri 1/305:50 amSEA - SYX

3 stops47h 15mMultiple Airlines

Fri 2/611:30 amSYX - SEA

2 stops26h 36mMultiple Airlines

Deal found 12/16

$1,188

Mon 1/57:09 amSEA - SYX

2 stops24h 21mMultiple Airlines

Mon 1/129:20 pmSYX - SEA

2 stops36h 32mMultiple Airlines

Deal found 12/16

$1,191

Mon 1/59:06 amSEA - SYX

2 stops36h 19mAir China

Sat 1/108:30 pmSYX - SEA

2 stops35h 59mAir China

Deal found 12/16

$1,832

Last-minute flights from Seattle to Hainan
Discover last-minute flight deals from Seattle to Hainan. Data last updated December 16, 2025 and is based on user searches.

Thu 12/255:50 amSEA - SYX

2 stops37h 10mMultiple Airlines

Sat 1/1011:15 pmSYX - SEA

2 stops30h 05mMultiple Airlines

Deal found 12/15

$4,348

Mon 1/511:28 amSEA - SYX

2 stops31h 32mMultiple Airlines

Tue 1/135:25 pmSYX - SEA

2 stops33h 56mMultiple Airlines

Deal found 12/16

$1,037

Mon 1/57:09 amSEA - SYX

2 stops24h 21mMultiple Airlines

Wed 1/149:20 pmSYX - SEA

2 stops36h 32mMultiple Airlines

Deal found 12/16

$1,046

Mon 1/57:09 amSEA - SYX

2 stops24h 21mMultiple Airlines

Mon 1/129:20 pmSYX - SEA

2 stops36h 32mMultiple Airlines

Deal found 12/16

$1,191

Mon 1/59:06 amSEA - SYX

2 stops36h 19mAir China

Fri 1/168:30 pmSYX - SEA

2 stops35h 14mAir China

Deal found 12/16

$1,699

Mon 1/59:06 amSEA - SYX

2 stops36h 19mAir China

Sat 1/108:30 pmSYX - SEA

2 stops35h 59mAir China

Deal found 12/16

$1,832

Thu 1/2912:10 amSEA - SYX

2 stops28h 55mMultiple Airlines

Fri 2/611:30 amSYX - SEA

2 stops26h 36mMultiple Airlines

Deal found 12/16

$1,103

Find flight deals from Seattle to Hainan

Round-trip from	$1,037 (Travelocity)

From Seattle/Tacoma Intl to Hainan

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

SeattleSanya

SEA - SYX

SEASYX

Seattle/Tacoma Intl

Mon 1/5

11:28 am-11:00 am

2 stops31h 32m

Sanya Phoenix Intl

Tue 1/13

5:25 pm-11:21 am

2 stops33h 56m

$1,037

SeattleSanya

SEA - SYX

SEASYX

Seattle/Tacoma Intl

Mon 1/5

7:09 am-11:30 pm

2 stops24h 21m

Sanya Phoenix Intl

Wed 1/14

9:20 pm-5:52 pm

2 stops36h 32m

$1,046

SeattleSanya

SEA - SYX

SEASYX

Seattle/Tacoma Intl

Fri 1/30

5:50 am-9:05 pm

3 stops47h 15m

Sanya Phoenix Intl

Fri 2/6

11:30 am-10:06 pm

2 stops26h 36m

$1,188

SeattleSanya

SEA - SYX

SEASYX

Seattle/Tacoma Intl

Mon 1/5

7:09 am-11:30 pm

2 stops24h 21m

Sanya Phoenix Intl

Mon 1/12

9:20 pm-5:52 pm

2 stops36h 32m

$1,191

SeattleSanya

SEA - SYX

SEASYX

Seattle/Tacoma Intl

Mon 1/5

9:06 am-1:25 pm

2 stops36h 19m

Sanya Phoenix Intl

Fri 1/16

8:30 pm-3:44 pm

2 stops35h 14m

$1,699

SeattleSanya

SEA - SYX

SEASYX

Seattle/Tacoma Intl

Mon 1/5

9:06 am-1:25 pm

2 stops36h 19m

Sanya Phoenix Intl

Sat 1/10

8:30 pm-4:29 pm

2 stops35h 59m

$1,832

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Best time to book a flight from Seattle to Hainan

Have a flexible travel schedule? Discover the best time to fly to Hainan 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 Hainan

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Hainan

Get a feel of what it's like to fly with Hainan Airlines from Seattle to Hainan by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Hainan Airlines

8.3

Very good

58 reviews

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

8.3

Very good

58 reviews

Hainan Airlines

8.3

Very good

58 reviews

Reviews

1 / 2

10.0

Excellent

Anonymous,Mar 2025

CAN - PEK

Related info for your journey

What airport do you fly from for flights from Seattle to Hainan?
Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Hainan. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.
Can I find deals for flights from Seattle to Hainan that include hotel bookings?
Yes. In addition to deals on Seattle to Hainan flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Hainan?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Hainan.
Can I find deals for business class flights from Seattle to Hainan?
Yes. Cheapflights offers flight deals from Seattle to Hainan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Seattle to Hainan

Airline	Cheapest	Average	Flexibility	On-time
Hainan Airlines	Cheapest$730	Average$1,170	FlexibilityNo cancel fee	On-time61%

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$1,037+ Cheap flights from Seattle (SEA) to Hainan

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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Hainan with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Seattle to Hainan

Cheapest flights from Seattle to HainanExplore the most affordable flight options available from Seattle to Hainan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Explore the most affordable flight options available from Seattle to Hainan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Find flight deals from Seattle to Hainan

Keep the following information in mind while searching for Seattle to Hainan flight deals. Data was last updated December 16, 2025.

Round-trip from

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Hainan that are best for you.

Best time to book a flight from Seattle to Hainan

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

Cheapflights Insights

Everything you need to know about your flight from Seattle to Hainan

Reviews of airlines servicing Hainan

Get a feel of what it's like to fly with Hainan Airlines from Seattle to Hainan by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Hainan. 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 from for flights from Seattle to Hainan?

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

How can I find direct flights from Seattle to Hainan?

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

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.

Alternative routes for Seattle to Hainan

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

Top airline flying from Seattle to Hainan

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Book with Flexibility

Travel Smart

Cheapest flights from Seattle to Hainan
Explore the most affordable flight options available from Seattle to Hainan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.