S$626 Cheap Flights from St. Louis to Singapore

View S$626 flight on Wed, 28 Jan, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Singapore Changi Airport (SIN)

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Cheap Flights from St. Louis to Singapore (STL-SIN)

Prices were available within the past 7 days and start at S$626 for one-way flights and S$1,404 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 22 Apr - Tue, 28 Apr
STL
St. Louis
SIN
Singapore
S$1,404 Return, found 5 days ago
S$1,404
Return
found 5 days ago
Select Alaska Airlines flight, departing Wed, 22 Apr from St. Louis to Singapore, returning Tue, 28 Apr, priced at S$1,404 found 5 days ago
United
Wed, 18 Mar - Wed, 1 Apr
STL
St. Louis
SIN
Singapore
S$1,435 Return, found 3 days ago
S$1,435
Return
found 3 days ago
Select United flight, departing Wed, 18 Mar from St. Louis to Singapore, returning Wed, 1 Apr, priced at S$1,435 found 3 days ago
Delta
Tue, 17 Mar - Tue, 31 Mar
STL
St. Louis
SIN
Singapore
S$1,453 Return, found 1 day ago
S$1,453
Return
found 1 day ago
Select Delta flight, departing Tue, 17 Mar from St. Louis to Singapore, returning Tue, 31 Mar, priced at S$1,453 found 1 day ago
Japan Airlines
Wed, 22 Apr - Tue, 28 Apr
STL
St. Louis
SIN
Singapore
S$1,479 Return, found 5 days ago
S$1,479
Return
found 5 days ago
Select Japan Airlines flight, departing Wed, 22 Apr from St. Louis to Singapore, returning Tue, 28 Apr, priced at S$1,479 found 5 days ago
All Nippon Airways
Wed, 22 Apr - Tue, 28 Apr
STL
St. Louis
SIN
Singapore
S$1,501 Return, found 5 days ago
S$1,501
Return
found 5 days ago
Select All Nippon Airways flight, departing Wed, 22 Apr from St. Louis to Singapore, returning Tue, 28 Apr, priced at S$1,501 found 5 days ago
Alaska Airlines
Wed, 18 Mar - Tue, 31 Mar
STL
St. Louis
SIN
Singapore
S$1,548 Return, found 1 day ago
S$1,548
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 18 Mar from St. Louis to Singapore, returning Tue, 31 Mar, priced at S$1,548 found 1 day ago
Qatar Airways
Tue, 17 Mar - Tue, 31 Mar
STL
St. Louis
SIN
Singapore
S$1,552 Return, found 1 day ago
S$1,552
Return
found 1 day ago
Select Qatar Airways flight, departing Tue, 17 Mar from St. Louis to Singapore, returning Tue, 31 Mar, priced at S$1,552 found 1 day ago
United
Tue, 17 Mar - Tue, 31 Mar
STL
St. Louis
SIN
Singapore
S$1,559 Return, found 1 day ago
S$1,559
Return
found 1 day ago
Select United flight, departing Tue, 17 Mar from St. Louis to Singapore, returning Tue, 31 Mar, priced at S$1,559 found 1 day ago
Cathay Pacific
Sat, 11 Apr - Fri, 17 Apr
STL
St. Louis
SIN
Singapore
S$1,559 Return, found 5 days ago
S$1,559
Return
found 5 days ago
Select Cathay Pacific flight, departing Sat, 11 Apr from St. Louis to Singapore, returning Fri, 17 Apr, priced at S$1,559 found 5 days ago
American Airlines
Wed, 22 Apr - Tue, 28 Apr
STL
St. Louis
SIN
Singapore
S$1,571 Return, found 5 days ago
S$1,571
Return
found 5 days ago
Select American Airlines flight, departing Wed, 22 Apr from St. Louis to Singapore, returning Tue, 28 Apr, priced at S$1,571 found 5 days ago

Frequently asked questions

How much is a flight from St. Louis Lambert International Airport to Changi Airport (SIN)?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey between Lambert Field and Changi Airport (SIN) was S$1,404. Cheap tickets don't stick around for long, so make sure you book yours ASAP. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from St. Louis Lambert International Airport to Changi Airport (SIN)?
The majority of flights can be conveniently cancelled online, but whether you are charged a fee all comes down to your airline. If you do need to cancel your break, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Lambert Field to Changi Airport (SIN) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for St. Louis Lambert International Airport to Changi Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Lambert Field to Singapore Airport?
With a flight distance of 15,300 kilometres from Lambert Field (STL) to Singapore Airport (SIN), this is a long journey. Be sure to drink plenty of water and go for a short walk down the aisle from time to time.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to SIN?
You won't find any airlines operating directly between Lambert Field and SIN, so be prepared to make at least one stop on your journey. A layover can be a welcome way to break up a trip!
Are STL to SIN flight tickets cheaper when they're purchased at the last minute?
It is possible to find great last-minute deals from STL to Changi Airport (SIN), but it can also be hit-or-miss. As many airlines release seats up to a year in advance, it's worthwhile keeping an eye on fares early and being ready to pounce when you spot a good bargain. Expedia compares air carrier prices and updates flight deals regularly, so you can rest assured you're always getting the latest offers.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Changi
Airlines serving
Air France, All Nippon Airways, American Airlines, British Airways, Cathay Pacific, Delta, KLM, Korean Air, Lufthansa, Qatar Airways, United
Return price
S$1,404
Distance
15231 km

Book with confidence

Flights from St. Louis to Singapore

There are several airlines that operate frequent flights from St. Louis (STL) to Singapore (SIN) including

The earliest flight leaves Lambert St. Louis Intl. Airport at 06:24 and arrives at Changi Airport at 06:15. The last flight of the day departs St. Louis at 19:21 and arrives at Singapore at 19:05.

The flight distance from St. Louis to Singapore is about 16454 km, the shortest flight is 21 hours 54 minutes with United Airlines.

Expedia lets you search across the largest number of airlines and Singapore flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your St. Louis Singapore flight!

Browse through dozens of options and rest assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your St. Louis to Singapore trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Singapore flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from St. Louis to Singapore with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

Flights from St. Louis to Singapore

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