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Flights from Seattle to Haikou

Search for direct flights from Seattle to Haikou in the next 3 months. Based on Trip.com's latest 7-day flight data, one-way direct flights start at US$1,224, and round-trip direct flights start at US$1,470.

      • Cheapest nonstop
        SEA 11:40
        18h 20m
        Nonstop
        HAK 21:00
        Seattle - Haikou | Tue, Jul 14 | Hainan Airlines
        HAK 07:10
        17h 30m
        Nonstop
        SEA 09:40
        Haikou - Seattle | Tue, Jul 21 | Hainan Airlines
        US$1,470 US$2,220
        34% off
        34% off
        US$2,220 US$1,470
      • SEA 14:05
        19h 45m
        1 stop
        HAK 00:50
        Seattle - Haikou | Tue, Jul 14 | Alaska Airlines
        HAK 11:40
        36h 5m
        1 stop
        SEA 08:45
        Haikou - Seattle | Tue, Jul 21 | Singapore Airlines
        US$1,721 US$2,220
        22% off
        22% off
        US$2,220 US$1,721
      • SEA 13:05
        20h 45m
        1 stop
        HAK 00:50
        Seattle - Haikou | Tue, Jul 14 | Korean Air
        HAK 11:40
        36h 5m
        1 stop
        SEA 08:45
        Haikou - Seattle | Tue, Jul 21 | Singapore Airlines
        US$1,941 US$2,220
        13% off
        13% off
        US$2,220 US$1,941
      • SEA 10:15
        33h 25m
        1 stop
        HAK 10:40
        Seattle - Haikou | Tue, Jul 14 | Singapore Airlines
        HAK 11:40
        36h 5m
        1 stop
        SEA 08:45
        Haikou - Seattle | Tue, Jul 21 | Singapore Airlines
        US$2,020
        9% off
        US$2,220 US$2,020
      • SEA 13:00
        17h 25m
        1 stop
        HAK 14:00
        Seattle - Haikou | Fri, Jun 19 | Normal Airline
        HAK 15:00
        6h
        Nonstop
        SEA 16:00
        Haikou - Seattle | Sun, Jun 21 | Normal Airline
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      • Cheapest nonstop
        SEA 11:55
        18h 5m
        Nonstop
        HAK 21:00
        Seattle - Haikou | Tue, Jun 23 | Hainan Airlines
        US$1,224 US$1,947
        37% off
        37% off
        US$1,947 US$1,224
      • SEA 14:05
        19h 30m
        1 stop
        HAK 00:35
        Seattle - Haikou | Wed, Jun 24 | Alaska Airlines
        US$943 US$1,947
        52% off
        52% off
        US$1,947 US$943
      • SEA 11:00
        38h 40m
        1 stop
        HAK 16:40
        Seattle - Haikou | Thu, Jun 18 | Hainan Airlines
        US$1,643 US$1,947
        16% off
        16% off
        US$1,947 US$1,643
      • SEA 12:25
        36h 15m
        1 stop
        HAK 15:40
        Seattle - Haikou | Thu, Jun 18 | Cathay Pacific
        US$1,752
        10% off
        US$1,947 US$1,752
      • SEA 10:15
        33h 25m
        1 stop
        HAK 10:40
        Seattle - Haikou | Thu, Jun 18 | Singapore Airlines
        US$1,771
        9% off
        US$1,947 US$1,771
      • SEA 13:00
        17h 25m
        1 stop
        HAK 14:00
        Seattle - Haikou | Fri, Jun 19 | Normal Airline
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Displayed flight fares from Seattle to Haikou are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Seattle to Haikou Flight Details

The distance between Seattle and Haikou is about 10,860.89 km. The average flying time from Seattle to Haikou is around 18 hours 5 minutes. Based on Trip.com's latest data, travel demand is highest in December. The off-season for travel is September.

Cheapest one-way flight priceUS$943
Cheapest return ticket priceUS$1,470
Cheapest monthSeptember
Peak season for travelDecember
Flight distance10,860.89 km
Average flight time18 hours 5 minutes
Flight statistics for the Seattle–Haikou route are based on aggregated booking data from Trip.com over the past 12 months.

Frequently Asked Questions

  • What are the cheapest flights from Seattle to Haikou (SEA-HAK)?

    Based on Trip.com data, Alaska Airlines offers one-way fares as low as US$943 on Cheapest nonstop routes (e.g. SEA to HAK on Wed, Jun 24), while Hainan Airlines offers Cheapest nonstop round-trips from US$1,470 departing on Tue, Jul 14 and returning on Tue, Jul 21.
  • It takes about 18 hours 5 minutes to fly from Seattle to Haikou.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Haikou is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Seattle to Haikou, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Jun 24, with one-way flights priced at just US$943.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Hainan Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Haikou travel is around December.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Seattle to Haikou is September, when demand for travel is lower.
  • After crunching the numbers on our June flight calendar, it's currently cheapest to fly from Seattle to Haikou on June 19, 2026 with Singapore Airlines, with prices starting at US$4,044.
  • The time difference between Haikou and Seattle is 16h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com Airline Insights on Flights from Seattle to Haikou

Which airline offers the cheapest direct flights from Seattle to Haikou?

Data is based on the average price of all nonstop flights from Seattle to Haikou on Trip.com over the past 12 months.

Based on Trip.com’s data from the past 12 months, Alaska Airlines provides the lowest-priced direct flights from Seattle to Haikou, with fares starting at US$444.

US$82
US$444
US$806
US$1,168
US$1,530
Alaska Airlines
US$444
Alaska Airlines
Hainan Airlines
US$1,004
Hainan Airlines
China Airlines
US$1,530
China Airlines

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Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.