$632 Cheap Flights from St. Louis (STL) to Xi'an (XIY)

View $632 flight on Tue, Aug 12, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Xi'an (XIY-Xianyang Intl.)

Cheap Flights from St. Louis to Xi'an (STL-XIY)

Prices were available within the past 7 days and start at $632 for one-way flights and $1,179 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cathay Pacific
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
XIY
Xi'an
$1,179 Roundtrip, found 2 hours ago
$1,179
Roundtrip
found 2 hours ago
Select Cathay Pacific flight, departing Tue, Jan 20 from St. Louis to Xi'an, returning Tue, Feb 3, priced at $1,179 found 2 hours ago
Cathay Pacific
Tue, Jan 20 - Mon, Feb 2
STL
St. Louis
XIY
Xi'an
$1,186 Roundtrip, found 1 day ago
$1,186
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Tue, Jan 20 from St. Louis to Xi'an, returning Mon, Feb 2, priced at $1,186 found 1 day ago
Cathay Pacific
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
XIY
Xi'an
$1,189 Roundtrip, found 2 hours ago
$1,189
Roundtrip
found 2 hours ago
Select Cathay Pacific flight, departing Tue, Jan 20 from St. Louis to Xi'an, returning Tue, Feb 3, priced at $1,189 found 2 hours ago
American Airlines
Wed, Feb 4 - Fri, Feb 20
STL
St. Louis
XIY
Xi'an
$1,195 Roundtrip, found 14 hours ago
$1,195
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Wed, Feb 4 from St. Louis to Xi'an, returning Fri, Feb 20, priced at $1,195 found 14 hours ago
Cathay Pacific
Tue, Jan 20 - Mon, Feb 2
STL
St. Louis
XIY
Xi'an
$1,197 Roundtrip, found 1 day ago
$1,197
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Tue, Jan 20 from St. Louis to Xi'an, returning Mon, Feb 2, priced at $1,197 found 1 day ago
Cathay Pacific
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
XIY
Xi'an
$1,199 Roundtrip, found 2 hours ago
$1,199
Roundtrip
found 2 hours ago
Select Cathay Pacific flight, departing Tue, Jan 20 from St. Louis to Xi'an, returning Tue, Feb 3, priced at $1,199 found 2 hours ago
American Airlines
Wed, Feb 4 - Fri, Feb 20
STL
St. Louis
XIY
Xi'an
$1,205 Roundtrip, found 14 hours ago
$1,205
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Wed, Feb 4 from St. Louis to Xi'an, returning Fri, Feb 20, priced at $1,205 found 14 hours ago
Cathay Pacific
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
XIY
Xi'an
$1,209 Roundtrip, found 2 hours ago
$1,209
Roundtrip
found 2 hours ago
Select Cathay Pacific flight, departing Tue, Jan 20 from St. Louis to Xi'an, returning Tue, Feb 3, priced at $1,209 found 2 hours ago
Korean Air
Mon, Feb 2 - Thu, Feb 12
STL
St. Louis
XIY
Xi'an
$1,501 Roundtrip, found 1 day ago
$1,501
Roundtrip
found 1 day ago
Select Korean Air flight, departing Mon, Feb 2 from St. Louis to Xi'an, returning Thu, Feb 12, priced at $1,501 found 1 day ago
United
Tue, Jun 9 - Tue, Jun 23
STL
St. Louis
XIY
Xi'an
$4,951 Roundtrip, found 1 day ago
$4,951
Roundtrip
found 1 day ago
Select United flight, departing Tue, Jun 9 from St. Louis to Xi'an, returning Tue, Jun 23, priced at $4,951 found 1 day ago
Flights from St. Louis (STL) to Xi'an (XIY)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Xianyang Intl.
Airlines serving
Cathay Pacific
Roundtrip price
$1,179
Distance
7233 mi

St. Louis to Xi'an Flights

The cheapest times to fly from St. Louis to Xi'an

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 St. Louis to Xi'an are during the month of January. You can find some of the cheapest flights from St. Louis to Xi'an with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Xi'an

Sunday is one of the best days to book for cheap flights from St. Louis to Xi'an: 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 St. Louis to Xi'an

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 St. Louis to Xi'an in 2025. You can also book with separate airlines for your outbound and return journeys, from $632 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 St. Louis to Xi'an 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 St. Louis to Xi'an 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 Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY) cost?
Secure a cheap one-way flight from $632 or cheap return flight from $1,179 from Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY)?
Flying in January may help you find better deals, as it's the cheapest month for flights between STL and XIY. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll take you from STL to XIY. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY)?
There aren't any daily nonstop flights available from Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time at all.
What day of the week has the most flights from STL to XIY?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY)?
Book a flight from Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY) that takes off before 3 PM to reduce the likelihood 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 Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY) last-minute?
Waiting until just before your departure to book your flight from STL to XIY often results in higher prices. While you may come across some last-minute deals, they aren't always guaranteed. Be flexible with your travel plans to boost your chances of landing a bargain.
Is it cheaper to book a STL to XIY flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to XIY flight and hotel package with Expedia could lead to significant savings. What's more, managing everything in one place will take the stress out of travel planning. Just secure your flights and choose from our extensive range of stays, then tailor your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Xianyang Intl. Airport (XIY)?
In most instances, you're able to reschedule or cancel your STL to XIY flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you need more information, visit our Customer Service portal.

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*Available to One Key members.