S$793 Cheap Flights from St. Louis to Singapore

View S$793 flight on Mon, 1 Sep, 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at S$793 for one-way flights and S$1,391 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,391 Return, found 13 hours ago
S$1,391
Return
found 13 hours ago
Select United flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,391 found 13 hours ago
Delta
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,409 Return, found 13 hours ago
S$1,409
Return
found 13 hours ago
Select Delta flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,409 found 13 hours ago
Japan Airlines
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,440 Return, found 13 hours ago
S$1,440
Return
found 13 hours ago
Select Japan Airlines flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,440 found 13 hours ago
Japan Airlines
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,444 Return, found 13 hours ago
S$1,444
Return
found 13 hours ago
Select Japan Airlines flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,444 found 13 hours ago
All Nippon Airways
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,462 Return, found 13 hours ago
S$1,462
Return
found 13 hours ago
Select All Nippon Airways flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,462 found 13 hours ago
All Nippon Airways
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,466 Return, found 13 hours ago
S$1,466
Return
found 13 hours ago
Select All Nippon Airways flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,466 found 13 hours ago
American Airlines
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,532 Return, found 13 hours ago
S$1,532
Return
found 13 hours ago
Select American Airlines flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,532 found 13 hours ago
Japan Airlines
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,536 Return, found 13 hours ago
S$1,536
Return
found 13 hours ago
Select Japan Airlines flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,536 found 13 hours ago
All Nippon Airways
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,599 Return, found 13 hours ago
S$1,599
Return
found 13 hours ago
Select All Nippon Airways flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,599 found 13 hours ago
American Airlines
Mon, 1 Sep - Tue, 16 Sep
STL
St. Louis
SIN
Singapore
S$1,624 Return, found 13 hours ago
S$1,624
Return
found 13 hours ago
Select American Airlines flight, departing Mon, 1 Sep from St. Louis to Singapore, returning Tue, 16 Sep, priced at S$1,624 found 13 hours ago
St. Louis to Singapore route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Changi
Airlines serving
Air Canada, Air France, All Nippon Airways, American Airlines, British Airways, Cathay Pacific, Delta, Finnair, Japan Airlines, KLM, Korean Air, Lufthansa, Qatar Airways, Turkish Airlines, United
Return price
S$1,390
Distance
15231 km

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!

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$1,391. 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.

Explore a world of travel with Expedia

*Available to Expedia members.