STL - SIN

$871 Find Cheap Flights from St. Louis to Singapore

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 12/22. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Singapore

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Singapore, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Singapore, as well as popular online travel agencies
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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

Tue, Sep 2 - Tue, Sep 9
Cathay Pacific Logo
5:30 pm - 7:05 pmSTL-SIN
36h 35m2 stops
Cathay Pacific Logo
9:45 am - 10:50 pmSIN-STL
26h 05m2 stops
$982Cathay Pacific
Find Deal
Thu, Sep 4 - Wed, Sep 17
Cathay Pacific Logo
3:59 pm - 3:05 pmSTL-SIN
34h 06m2 stops
Cathay Pacific Logo
8:05 pm - 7:10 pmSIN-STL
36h 05m2 stops
$988Cathay Pacific
Find Deal
Tue, Sep 2 - Mon, Sep 8
Cathay Pacific Logo
6:45 am - 12:50 amSTL-SIN
29h 05m2 stops
Cathay Pacific Logo
1:50 am - 8:32 pmSIN-STL
31h 42m2 stops
$1,002Cathay Pacific
Find Deal
Wed, Sep 17 - Wed, Sep 24
American Airlines Logo
8:50 am - 12:20 amSTL-SIN
26h 30m2 stops
American Airlines Logo
8:05 am - 10:50 pmSIN-STL
27h 45m2 stops
$1,021American Airlines
Find Deal
Sat, Oct 4 - Sat, Oct 11
Air Canada Logo
4:05 pm - 7:05 amSTL-SIN
50h 00m2 stops
Air Canada Logo
9:10 am - 3:18 pmSIN-STL
43h 08m2 stops
$1,043Air Canada
Find Deal
Thu, Sep 4 - Wed, Sep 17
United Airlines Logo
11:30 am - 6:15 amSTL-SIN
29h 45m2 stops
United Airlines Logo
8:45 am - 4:53 pmSIN-STL
21h 08m1 stop
$1,086United Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 17
United Airlines Logo
5:49 pm - 6:15 amSTL-SIN
23h 26m1 stop
United Airlines Logo
8:45 am - 4:53 pmSIN-STL
21h 08m1 stop
$1,095United Airlines
Find Deal
Wed, Sep 17 - Tue, Sep 23
Japan Airlines Logo
7:23 am - 12:20 amSTL-SIN
27h 57m2 stops
Japan Airlines Logo
1:55 am - 1:31 pmSIN-STL
24h 36m2 stops
$1,097Japan Airlines
Find Deal
Fri, Jan 16 - Sat, Jan 31
Air Canada Logo
4:05 pm - 6:55 amSTL-SIN
48h 50m2 stops
Air Canada Logo
8:30 am - 3:29 pmSIN-STL
44h 59m2 stops
$1,148Air Canada
Find Deal
Fri, Jan 16 - Fri, Jan 30
Japan Airlines Logo
3:36 pm - 5:25 pmSTL-SIN
35h 49m2 stops
Japan Airlines Logo
2:20 am - 11:08 amSIN-STL
22h 48m2 stops
$1,179Japan Airlines
Find Deal
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.

How much is a round-trip flight from St. Louis to Singapore?

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 November, where tickets cost $1,309 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,839 and $1,593 respectively.

Good to know

Low seasonApril
Cheapest flight$871
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly and prices are also 11% lower on average.
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 3 days, the lowest price for a flight from St. Louis to Singapore was $871 for a one-way ticket and $982 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?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between St. Louis and Singapore, with oneworld being the most commonly used for this route.

  • 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 8915 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
Airline reviews

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

8.0 ExcellentBill, Aug 2025IAH - LAX
Read more United Airlines reviews

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight attendant in first class gave poor service (like he didn't want to be there) and food was awful. We sat waiting for gate upon arrival over 45 mins.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

The service was good, the food could have been better.

Staff was rude. Didn’t give water for 2 hours. Worst service

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

This flight was perfect. No complaints and only the highest regard for the crew and ground staff and how they executed perfectly. I fly a lot with United and would request predictability and transparency in their operations instead of last minute changes.

This is for UA2274 from Houston to Sacramento. The flight was delayed arriving due to mechanical issues so we left about 3 hours later than scheduled. When boarding the plane the temperature inside was excessive - likely close to 100. Pilot apologized and said it was going to improve at altitude, which it did. But before that I honestly thought there might have been more delays removing passengers made ill from the heat. We were delayed leaving due to another mechanical issue. There was not water on the plane due to a panel that was not secured. They did that quickly, but the combination of mechanical issues was rather disturbing and did not reflect well on United.

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

Information on your arrival and departure airports

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