STL - SIN

$531 Find Cheap Flights from St. Louis to Singapore - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Singapore departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$1,134
Typical prices: $1,288-$1,410
Air Canada
Thu 8/20Tue 8/25
STL - SIN • 2 stops
Cheapest one-way
$531
Multiple Airlines
Thu 8/27
STL - SIN • 2 stops
Top airlines
Air Canada
Cheapest • from $1,134 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Singapore. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 100% price drop
February
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Singapore!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Singapore that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Singapore

Thu, Aug 20 - Tue, Aug 25
Air Canada Logo
12:10 pm - 5:15 am
STL
-
SIN
28h 05m
2 stops
Air Canada Logo
7:00 am - 12:40 pm
SIN
-
STL
42h 40m
2 stops
$1,134Air Canada
Mon, Aug 31 - Tue, Sep 15
Qatar Airways Logo
6:00 am - 9:15 pm
STL
-
SIN
50h 15m
2 stops
Qatar Airways Logo
7:40 pm - 12:27 am
SIN
-
STL
41h 47m
2 stops
$1,155Qatar Airways
Tue, Aug 18 - Tue, Aug 25
Air Canada Logo
12:10 pm - 5:15 am
STL
-
SIN
28h 05m
2 stops
Air Canada Logo
6:15 am - 6:42 pm
SIN
-
STL
49h 27m
2 stops
$1,162Air Canada
Tue, Nov 10 - Mon, Nov 30
Multiple Airlines Logo
1:39 pm - 7:00 am
STL
-
SIN
27h 21m
2 stops
Multiple Airlines Logo
11:10 pm - 3:26 pm
SIN
-
STL
54h 16m
2 stops
$1,163Multiple Airlines
Thu, Aug 20 - Thu, Aug 27
Air Canada Logo
12:10 pm - 5:15 am
STL
-
SIN
28h 05m
2 stops
Air Canada Logo
6:15 am - 6:42 pm
SIN
-
STL
49h 27m
2 stops
$1,169Air Canada
Thu, Aug 20 - Thu, Aug 27
Multiple Airlines Logo
7:58 pm - 12:45 am
STL
-
SIN
39h 47m
3 stops
Multiple Airlines Logo
11:05 am - 5:50 pm
SIN
-
STL
43h 45m
3 stops
$1,175Multiple Airlines
Mon, Aug 31 - Tue, Sep 15
Lufthansa Logo
3:30 pm - 4:30 pm
STL
-
SIN
36h 00m
1 stop
Lufthansa Logo
10:45 pm - 1:25 pm
SIN
-
STL
27h 40m
2 stops
$1,188Lufthansa
Tue, Sep 15 - Mon, Sep 28
Lufthansa Logo
12:28 pm - 6:50 am
STL
-
SIN
29h 22m
2 stops
Lufthansa Logo
11:40 pm - 1:25 pm
SIN
-
STL
26h 45m
1 stop
$1,192Lufthansa
Mon, Aug 31 - Tue, Sep 15
Lufthansa Logo
3:30 pm - 4:30 pm
STL
-
SIN
36h 00m
1 stop
Lufthansa Logo
12:35 pm - 1:25 pm
SIN
-
STL
37h 50m
1 stop
$1,204Lufthansa
Tue, Sep 15 - Mon, Sep 28
Lufthansa Logo
3:30 pm - 4:30 pm
STL
-
SIN
36h 00m
1 stop
Lufthansa Logo
11:40 pm - 1:25 pm
SIN
-
STL
26h 45m
1 stop
$1,277Lufthansa
Booking Insights

KAYAK's insights & trends for St. Louis to Singapore flights

Get data-powered insights and trends into flights from St. Louis to Singapore to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from St. Louis to Singapore?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Singapore, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Singapore is October, where tickets cost $0 (return) on average. On the other hand, the most expensive months are February and April, where the average cost of round-trip tickets is $2,512 and $2,228 respectively.

Find deals

Good to know

Low seasonNovember
Cheapest flight$531
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 49% increase in price.
Flight from St. Louis to Singapore

When to book flights from St. Louis to Singapore

Are your dates flexible? Find out the best times to travel from St. Louis to Singapore based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Singapore

  • What is the cheapest flight from St. Louis to Singapore?

    In the last 5 days, the lowest price for a flight from St. Louis to Singapore was $531 for a one-way ticket and $1,134 for a round-trip.

  • Do I need a passport to fly between St. Louis and Singapore?

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in Singapore.

  • Which aircraft models fly most regularly from St. Louis to Singapore?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Singapore?

    Star Alliance is the only airline alliance operating flights between St. Louis and Singapore.

  • How does KAYAK find such low prices on flights from St. Louis to Singapore?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Singapore.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Singapore?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Singapore from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Singapore?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Singapore with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SIN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Singapore?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Singapore from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from St. Louis to Singapore

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Singapore. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Singapore? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9948 reviews
7.7Boarding
6.7Food
7.3Comfort
8.1Crew
7.1Entertainment
Airline reviews

It was perfect! United Airlines staff was extremely caring, super friendly and professional

10.0 ExcellentClaudia, Jun 2026
SFO - SIN
Read more United Airlines reviews

It was perfect! United Airlines staff was extremely caring, super friendly and professional

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

UA28 was good service and meals. UA is upgraded, I would like to book for next flight by UA Thanks Liao

Food is very bad and entertint not too many options ... flight attendet service is not good

For a 17 hour flight, they kept us well feed. The music selection could be better curated. The entertainment selection was about what is expected. The crew was fantastic.

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

I forgot to pre order gluten free on a 16 hour flight and I am pretty sure the crew raided their own lunches and first class to keep me fed.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

Everything you need to know for your flight from St. Louis to Singapore

Information on your arrival and departure airports

St. Louis (STL)
Singapore (SIN)