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$783+ Cheap flights from St. Louis (STL) to Singapore

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
Nov 9 — Nov 161
Sun 11/9
Sun 11/16
1 adult, Economy
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Cheap flight deals from St. Louis to Singapore

Keep the following information in mind while searching for St. Louis to Singapore flight deals. Data was last updated October 10, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,127
(oojo)

One-way from

$783
(United Airlines)

Popular in

December

Cheapest in

February
Provider with most accurate pricing for Lambert-St Louis-Singapore Changi flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Singapore Changi flights.
Search Deals
From Lambert-St Louis to Singapore
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One-way flight from Lambert-St Louis to Singapore
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($37 potential savings vs. average RT price).
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Find flight deals from St. Louis to Singapore

Cheapest flights from St. Louis to Singapore
Explore the most affordable flight options available from St. Louis to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2025.

This oojo deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:00 amSTL - SIN
2 stops44h 50mCathay Pacific
Thu 11/201:25 amSIN - STL
2 stops36h 37mCathay Pacific
Deal found 10/9$1,077
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:29 pmSTL - SIN
1 stop24h 31mUnited Airlines
Fri 11/2110:10 amSIN - STL
2 stops26h 17mUnited Airlines
Deal found 10/9$1,179
This Ovago deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/196:39 amSTL - SIN
2 stops40h 06mCathay Pacific
Thu 10/231:50 amSIN - STL
2 stops30h 19mCathay Pacific
Deal found 10/8$1,207
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:35 pmSTL - SIN
1 stop23h 40mUnited Airlines
Tue 10/148:45 amSIN - STL
1 stop21h 09mUnited Airlines
Deal found 10/8$1,366
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1912:25 pmSTL - SIN
2 stops53h 15mUnited Airlines
Fri 10/248:45 amSIN - STL
1 stop21h 09mUnited Airlines
Deal found 10/8$1,382
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/135:35 pmSTL - SIN
1 stop23h 40mUnited Airlines
Wed 10/158:40 pmSIN - STL
2 stops27h 09mUnited Airlines
Deal found 10/9$1,422
This Gotogate deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/224:05 pmSTL - SIN
2 stops48h 55mAir Canada
Sat 11/298:50 amSIN - STL
2 stops21h 38mAir Canada
Deal found 10/8$1,466

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Singapore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 10, 2025.
Use the filters below to find and compare flights from St. Louis to Singapore that are best for you.

Fly from

St. Louis

Fly to

Singapore

Route

Depart

Return

Price

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 4/7

6:00 pm-12:25 pm

2 stops29h 25m

Singapore Changi

Mon 4/27

1:50 am-11:24 pm

2 stops34h 34m

$1,027

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 11/12

6:00 am-4:50 pm

2 stops44h 50m

Singapore Changi

Thu 11/20

1:25 am-12:02 am

2 stops36h 37m

$1,077

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 3/8

6:15 am-5:40 am

2 stops34h 25m

Singapore Changi

Wed 3/11

1:25 am-10:24 pm

2 stops33h 59m

$1,117

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

11:06 am-5:40 am

2 stops28h 34m

Singapore Changi

Fri 1/30

1:25 am-11:59 pm

2 stops36h 34m

$1,127

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 4/7

6:15 am-6:45 am

2 stops35h 30m

Singapore Changi

Tue 4/28

9:00 am-5:03 pm

1 stop21h 03m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 11/12

5:29 pm-8:00 am

1 stop24h 31m

Singapore Changi

Fri 11/21

10:10 am-10:27 pm

2 stops26h 17m

$1,179

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 1/16

11:20 am-6:55 am

2 stops29h 35m

Singapore Changi

Sat 1/31

10:20 pm-5:11 am

1 stop20h 51m

$1,234

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 12/28

6:00 am-8:15 pm

2 stops48h 15m

$783

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Fri 11/21

7:00 am-1:05 pm

3 stops40h 05m

$1,455

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 12/20

5:26 pm-8:45 am

2 stops73h 19m

$1,577

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/8

Showing 1-10 of 14 results
1
2

Best time to book a flight from St. Louis to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest time of day to fly from STL to SG?

Find hourly flight availability from St. Louis to Singapore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 10, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Singapore in the evening. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Singapore

Get insights into the airlines that provide service to Singapore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Singapore. Reviews last updated October 10, 2025.
Read through reviews of airlines operating flights from St. Louis to Singapore, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,968 reviews

Comfort

7.3

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,968 reviews
United Airlines
7.4
Good
8,968 reviews

Comfort

7.3

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Singapore?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Singapore. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Singapore?

    Airlines like Cathay Pacific fly from St. Louis to Singapore in about 29h 25m. The time it takes to get you to your destination can typically vary by up to . The distance between St. Louis and Singapore is about 9513 mi.

  • Can I find deals for flights from St. Louis to Singapore that include hotel bookings?

    Yes. In addition to deals on St. Louis to Singapore flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Singapore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Singapore.

  • Can I find deals for business class flights from St. Louis to Singapore?

    Yes. Cheapflights offers flight deals from St. Louis to Singapore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top airline flying from St. Louis to Singapore

Discover the top airline that operate flights from St. Louis to Singapore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,094Average$1,439FlexibilityNo cancel feeOn-time69%

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