HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Lanzhou

$915+ Cheap flights from Seattle (SEA) to Lanzhou (LHW)

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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHW
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Lanzhou with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Lanzhou

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Lanzhou (LHW). 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 September 15, 2025.

Round-trip from

$915
(Hainan Airlines)
From Seattle/Tacoma Intl to Lanzhou Arpt
Search Deals

Find flight deals from Seattle to Lanzhou

Best flights from Seattle to Lanzhou
Discover carefully curated flight deals from Seattle to Lanzhou that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

This Hainan Airlines deal was found by Cheapflights users on 9/13. 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 Hainan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:05 amSEA - LHW
3 stops39h 15mHainan Airlines
Mon 3/911:40 amLHW - SEA
1 stop36h 20mHainan Airlines
Deal found 9/13$915
This Delta deal was found by Cheapflights users on 9/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:45 amSEA - LHW
1 stop21h 50mDelta
Mon 3/97:55 amLHW - SEA
1 stop20h 55mDelta
Deal found 9/13$3,121

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Lanzhou 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 September 15, 2025.
Use the filters below to find and compare flights from Seattle to Lanzhou that are best for you.

Fly from

Seattle

Fly to

Lanzhou

Route

Depart

Return

Price

SeattleLanzhou

SEA - LHW

SEALHW

Seattle/Tacoma Intl

Thu 3/5

10:05 am-5:20 pm

3 stops39h 15m

Lanzhou Arpt

Mon 3/9

11:40 am-9:00 am

1 stop36h 20m

$915

SeattleLanzhou

SEA - LHW

SEALHW

Seattle/Tacoma Intl

Thu 3/5

10:45 am-12:35 am

1 stop21h 50m

Lanzhou Arpt

Mon 3/9

7:55 am-1:50 pm

1 stop20h 55m

$3,121

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Best time to book a flight from Seattle to Lanzhou

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

Related info for your journey

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

    Hainan Airlines can get you from Seattle to Lanzhou in just under 39h 15m. Your travel time can differ by up to . Seattle and Lanzhou are separated by a distance of 5975 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Lanzhou 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

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

Search flights from Seattle to Lanzhou by cabin class

Find flights from Seattle to Lanzhou, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.