S$540 Cheap Flights from St. Louis to Singapore

View S$540 flight on Wed, 12 Nov, 2025Opens 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$540 for one-way flights and S$2,514 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, 21 Dec - Fri, 9 Jan
STL
St. Louis
SIN
Singapore
S$2,514 Return, found 6 days ago
S$2,514
Return
found 6 days ago
Select United flight, departing Sun, 21 Dec from St. Louis to Singapore, returning Fri, 9 Jan, priced at S$2,514 found 6 days ago
United
Sun, 21 Dec - Fri, 9 Jan
STL
St. Louis
SIN
Singapore
S$2,788 Return, found 6 days ago
S$2,788
Return
found 6 days ago
Select United flight, departing Sun, 21 Dec from St. Louis to Singapore, returning Fri, 9 Jan, priced at S$2,788 found 6 days ago
American Airlines
Sun, 28 Dec - Sun, 4 Jan
STL
St. Louis
SIN
Singapore
S$2,899 Return, found 4 days ago
S$2,899
Return
found 4 days ago
Select American Airlines flight, departing Sun, 28 Dec from St. Louis to Singapore, returning Sun, 4 Jan, priced at S$2,899 found 4 days ago
United
Sun, 28 Dec - Sun, 4 Jan
STL
St. Louis
SIN
Singapore
S$2,911 Return, found 4 days ago
S$2,911
Return
found 4 days ago
Select United flight, departing Sun, 28 Dec from St. Louis to Singapore, returning Sun, 4 Jan, priced at S$2,911 found 4 days ago
United
Fri, 19 Dec - Thu, 1 Jan
STL
St. Louis
SIN
Singapore
S$4,299 Return, found 3 hours ago
S$4,299
Return
found 3 hours ago
Select United flight, departing Fri, 19 Dec from St. Louis to Singapore, returning Thu, 1 Jan, priced at S$4,299 found 3 hours ago
Alaska Airlines
Fri, 19 Dec - Thu, 1 Jan
STL
St. Louis
SIN
Singapore
S$4,426 Return, found 3 hours ago
S$4,426
Return
found 3 hours ago
Select Alaska Airlines flight, departing Fri, 19 Dec from St. Louis to Singapore, returning Thu, 1 Jan, priced at S$4,426 found 3 hours ago
American Airlines
Fri, 19 Dec - Thu, 1 Jan
STL
St. Louis
SIN
Singapore
S$4,674 Return, found 3 hours ago
S$4,674
Return
found 3 hours ago
Select American Airlines flight, departing Fri, 19 Dec from St. Louis to Singapore, returning Thu, 1 Jan, priced at S$4,674 found 3 hours ago
United
Fri, 19 Dec - Thu, 1 Jan
STL
St. Louis
SIN
Singapore
S$4,688 Return, found 3 hours ago
S$4,688
Return
found 3 hours ago
Select United flight, departing Fri, 19 Dec from St. Louis to Singapore, returning Thu, 1 Jan, priced at S$4,688 found 3 hours ago
Japan Airlines
Fri, 19 Dec - Thu, 1 Jan
STL
St. Louis
SIN
Singapore
S$4,691 Return, found 3 hours ago
S$4,691
Return
found 3 hours ago
Select Japan Airlines flight, departing Fri, 19 Dec from St. Louis to Singapore, returning Thu, 1 Jan, priced at S$4,691 found 3 hours ago
Cathay Pacific
Fri, 19 Dec - Thu, 1 Jan
STL
St. Louis
SIN
Singapore
S$4,725 Return, found 3 hours ago
S$4,725
Return
found 3 hours ago
Select Cathay Pacific flight, departing Fri, 19 Dec from St. Louis to Singapore, returning Thu, 1 Jan, priced at S$4,725 found 3 hours 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$2,514. 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
Return price
S$2,513
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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