$1,148 Cheap Flights from Xining (XNN) to Seattle (SEA)

View $1,148 flight on Mon, Aug 4, 2025Opens in a new window

Popular airlines from Xining (XNN-Caojiabao Intl.) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Xining to Seattle (XNN-SEA)

Prices were available within the past 7 days and start at $1,148 for one-way flights and $1,929 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air China
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$1,929 Roundtrip, found 23 hours ago
$1,929
Roundtrip
found 23 hours ago
Select Air China flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $1,929 found 23 hours ago
Sichuan Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$1,931 Roundtrip, found 23 hours ago
$1,931
Roundtrip
found 23 hours ago
Select Sichuan Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $1,931 found 23 hours ago
China Southern Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$2,107 Roundtrip, found 23 hours ago
$2,107
Roundtrip
found 23 hours ago
Select China Southern Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $2,107 found 23 hours ago
China Southern Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$2,118 Roundtrip, found 23 hours ago
$2,118
Roundtrip
found 23 hours ago
Select China Southern Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $2,118 found 23 hours ago
China Southern Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$2,128 Roundtrip, found 23 hours ago
$2,128
Roundtrip
found 23 hours ago
Select China Southern Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $2,128 found 23 hours ago
China Southern Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$2,140 Roundtrip, found 23 hours ago
$2,140
Roundtrip
found 23 hours ago
Select China Southern Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $2,140 found 23 hours ago
China Southern Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$2,144 Roundtrip, found 23 hours ago
$2,144
Roundtrip
found 23 hours ago
Select China Southern Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $2,144 found 23 hours ago
China Southern Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$2,149 Roundtrip, found 23 hours ago
$2,149
Roundtrip
found 23 hours ago
Select China Southern Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $2,149 found 23 hours ago
China Southern Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$2,157 Roundtrip, found 23 hours ago
$2,157
Roundtrip
found 23 hours ago
Select China Southern Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $2,157 found 23 hours ago
China Southern Airlines
Tue, Aug 5 - Thu, Aug 14
XNN
Xining
SEA
Seattle
$2,160 Roundtrip, found 23 hours ago
$2,160
Roundtrip
found 23 hours ago
Select China Southern Airlines flight, departing Tue, Aug 5 from Xining to Seattle, returning Thu, Aug 14, priced at $2,160 found 23 hours ago
Flights from Xining (XNN) to Seattle (SEA)
Origin airport
Caojiabao Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air China
Roundtrip price
$1,928
Distance
6021 mi

Xining to Seattle Flights

The cheapest times to fly from Xining to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Xining to Seattle are during the month of August. You can find some of the cheapest flights from Xining to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Xining to Seattle

Sunday is one of the best days to book for cheap flights from Xining to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Xining to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Xining to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,148 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Xining to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Xining to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Xining Airport (XNN) to Seattle - Tacoma Intl. Airport (SEA) cost?
Discover the latest flight deals from XNN to SEA by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from XNN to SEA?
The cheapest flights from XNN to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from XNN to SEA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from XNN to SEA. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Xining Airport (XNN) to Seattle - Tacoma Intl. Airport (SEA)?
You'll have to hop on a flight with a layover when traveling from Xining Airport (XNN) to Seattle - Tacoma Intl. Airport (SEA). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from XNN to SEA?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a number of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Xining Airport (XNN) to Seattle - Tacoma Intl. Airport (SEA)?
Opt for a flight from Xining Airport (XNN) to Seattle - Tacoma Intl. Airport (SEA) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Xining Airport (XNN) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute bookings from XNN to SEA are generally more expensive. For the best rates, start looking for flights early. That being said, if you can play around with your travel dates, it's possible to score a cheap fare right before you leave.
Is it cheaper to book a XNN to SEA flight and hotel package?
Compared with arranging flights and hotels separately, booking a XNN to SEA flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place will take the hassle out of planning your trip. Simply pick your flights and choose from our extensive range of stays, then tailor your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Xining Airport (XNN) to Seattle - Tacoma Intl. Airport (SEA)?
You can usually reschedule or cancel your XNN to SEA flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.