What is the cheapest airline that flies from Lambert-St Louis to Singapore Changi?

Cathay Pacific is the most popular carrier operating from Lambert-St Louis to Singapore Changi

When did momondo last update prices for flights from Lambert-St Louis Airport to Singapore Changi Airport?

Prices for flights from Lambert-St Louis Airport to Singapore Changi Airport are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Singapore Changi Airport?

As of August 2026, there is 1 operator available to choose from for flights from Lambert-St Louis Airport to Singapore Changi Airport.

How old do you have to be to fly from Lambert-St Louis Airport to Singapore Changi Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Singapore Changi Airport.

What documentation or ID do you need to fly to Singapore Changi Airport?

The travel and health documents you'll need for your trip to Singapore Changi Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Singapore Changi Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$549 Cheap Flights from St. Louis to Singapore in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Singapore

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

12:10 pm - 5:15 amSTL Lambert-St Louis-SIN Singapore Changi

52h 05m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

8:30 am - 3:26 pmSIN Singapore Changi-STL Lambert-St Louis

44h 56m2 stops Incheon Intl Toronto Pearson Intl

$1,117Air Canada

Wed, Oct 14 - Wed, Nov 4

6:29 am - 9:15 pmSTL Lambert-St Louis-SIN Singapore Changi

49h 46m2 stops Seattle/Tacoma Intl Doha Hamad Intl

7:40 pm - 11:59 pmSIN Singapore Changi-STL Lambert-St Louis

41h 19m2 stops Doha Hamad Intl Seattle/Tacoma Intl

$1,149Multiple Airlines

Thu, Oct 1 - Thu, Oct 8

12:10 pm - 5:15 amSTL Lambert-St Louis-SIN Singapore Changi

28h 05m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

7:00 am - 6:41 pmSIN Singapore Changi-STL Lambert-St Louis

48h 41m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

$1,171Air Canada

Sun, Oct 4 - Sun, Oct 11

12:10 pm - 5:15 amSTL Lambert-St Louis-SIN Singapore Changi

28h 05m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

8:40 am - 4:26 pmSIN Singapore Changi-STL Lambert-St Louis

44h 46m2 stops Vancouver Intl Toronto Pearson Intl

$1,221Air Canada

Fri, Oct 16 - Sat, Oct 31

12:10 pm - 5:15 amSTL Lambert-St Louis-SIN Singapore Changi

52h 05m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl

7:00 am - 8:20 pmSIN Singapore Changi-STL Lambert-St Louis

26h 20m2 stops Vancouver Intl Toronto Pearson Intl

$1,221Air Canada

Sat, Oct 3 - Sat, Oct 10

7:02 am - 3:45 pmSTL Lambert-St Louis-SIN Singapore Changi

43h 43m2 stops Seattle/Tacoma Intl Doha Hamad Intl

3:15 am - 11:59 pmSIN Singapore Changi-STL Lambert-St Louis

33h 44m2 stops Doha Hamad Intl Seattle/Tacoma Intl

$1,227Multiple Airlines

Fri, Oct 9 - Sat, Oct 17

7:02 am - 3:45 pmSTL Lambert-St Louis-SIN Singapore Changi

43h 43m2 stops Seattle/Tacoma Intl Doha Hamad Intl

3:15 am - 11:59 pmSIN Singapore Changi-STL Lambert-St Louis

33h 44m2 stops Doha Hamad Intl Seattle/Tacoma Intl

$1,238Multiple Airlines

Fri, Oct 9 - Sat, Oct 17

6:00 am - 3:05 pmSTL Lambert-St Louis-SIN Singapore Changi

44h 05m2 stops Los Angeles Hong Kong Intl

7:20 am - 6:38 pmSIN Singapore Changi-STL Lambert-St Louis

24h 18m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,242Cathay Pacific

Sun, Sep 6 - Thu, Sep 10

7:08 am - 6:35 pmSTL Lambert-St Louis-SIN Singapore Changi

22h 27m1 stop San Francisco

10:10 am - 6:05 pmSIN Singapore Changi-STL Lambert-St Louis

21h 55m1 stop San Francisco

$1,291United Airlines

Wed, Oct 14 - Wed, Nov 4

7:08 am - 6:35 pmSTL Lambert-St Louis-SIN Singapore Changi

22h 27m1 stop San Francisco

8:35 pm - 9:21 pmSIN Singapore Changi-STL Lambert-St Louis

37h 46m2 stops San Francisco Chicago O'Hare Intl

$1,296United Airlines

Thu, Oct 1 - Thu, Oct 8

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Air Canada flights from St. Louis to Singapore

Our best Air Canada deals on St. Louis to Singapore flight tickets

Air Canada

Oct 14

STL12:10 pmLambert-St Louis

52h 05m

2 stops

SIN5:15 amSingapore Changi

Nov 4

SIN8:30 amSingapore Changi

44h 56m

2 stops

STL3:26 pmLambert-St Louis

$1,117

Air Canada

Oct 4

STL12:10 pmLambert-St Louis

28h 05m

2 stops

SIN5:15 amSingapore Changi

Oct 11

SIN7:00 amSingapore Changi

48h 41m

2 stops

STL6:41 pmLambert-St Louis

$1,171

Air Canada

Oct 3

STL12:10 pmLambert-St Louis

52h 05m

2 stops

SIN5:15 amSingapore Changi

Oct 10

SIN7:00 amSingapore Changi

26h 20m

2 stops

STL8:20 pmLambert-St Louis

$1,221

United Airlines flights from St. Louis to Singapore

Our best United Airlines deals on St. Louis to Singapore flight tickets

United Airlines

Oct 14

STL7:08 amLambert-St Louis

22h 27m

1 stop

SIN6:35 pmSingapore Changi

Nov 4

SIN10:10 amSingapore Changi

21h 55m

1 stop

STL6:05 pmLambert-St Louis

$1,291

United Airlines

Oct 9

STL7:08 amLambert-St Louis

22h 27m

1 stop

SIN6:35 pmSingapore Changi

Oct 18

SIN8:35 pmSingapore Changi

37h 01m

2 stops

STL8:36 pmLambert-St Louis

$1,296

United Airlines

Oct 3

STL5:10 amLambert-St Louis

24h 25m

2 stops

SIN6:35 pmSingapore Changi

Oct 10

SIN8:45 amSingapore Changi

22h 58m

1 stop

STL6:43 pmLambert-St Louis

$1,341

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Wed 10/14

12:10 pm-5:15 am

2 stops52h 05m

Singapore Changi

Wed 11/4

8:30 am-3:26 pm

2 stops44h 56m

$1,117

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Thu 10/1

6:29 am-9:15 pm

2 stops49h 46m

Singapore Changi

Thu 10/8

7:40 pm-11:59 pm

2 stops41h 19m

$1,149

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Sun 10/4

12:10 pm-5:15 am

2 stops28h 05m

Singapore Changi

Sun 10/11

7:00 am-6:41 pm

2 stops48h 41m

$1,171

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Fri 10/16

12:10 pm-5:15 am

2 stops28h 05m

Singapore Changi

Sat 10/31

8:40 am-4:26 pm

2 stops44h 46m

$1,221

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Sat 10/3

12:10 pm-5:15 am

2 stops52h 05m

Singapore Changi

Sat 10/10

7:00 am-8:20 pm

2 stops26h 20m

$1,221

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Fri 10/9

7:02 am-3:45 pm

2 stops43h 43m

Singapore Changi

Sat 10/17

3:15 am-11:59 pm

2 stops33h 44m

$1,227

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Fri 10/9

7:02 am-3:45 pm

2 stops43h 43m

Singapore Changi

Sat 10/17

3:15 am-11:59 pm

2 stops33h 44m

$1,238

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Sun 9/6

6:00 am-3:05 pm

2 stops44h 05m

Singapore Changi

Thu 9/10

7:20 am-6:38 pm

2 stops24h 18m

$1,242

Quickest round-trip

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Wed 10/14

7:08 am-6:35 pm

1 stop22h 27m

Singapore Changi

Wed 11/4

10:10 am-6:05 pm

1 stop21h 55m

$1,291

St. LouisSingapore

STL Lambert-St Louis - SIN Singapore Changi

STLSIN

Lambert-St Louis

Thu 10/1

7:08 am-6:35 pm

1 stop22h 27m

Singapore Changi

Thu 10/8

8:35 pm-9:21 pm

2 stops37h 46m

$1,296

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Singapore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Singapore?

The month of October is, on average, the cheapest month to fly to Singapore from St. Louis, with most prices found around $1,035. If you aren’t able to travel to Singapore during the month of October, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $1,198.

Can stopping save me money on St. Louis to Singapore flights?

You could potentially save up to 18% on your flight if you consider stops on a St. Louis to Singapore flight.

When to book flights from St. Louis to Singapore

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Singapore according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Singapore (STL to SIN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Singapore

Best Price Found	$549
Fastest flight time	28h 51m
Direct flights	None

The best one-way flight to Singapore from St. Louis in the past 72 hours is $549. The best round-trip flight deal from St. Louis to Singapore found on momondo in the last 72 hours is $1,117.

The fastest flight from St. Louis to Singapore takes 28h 51m

There are no direct flights from St. Louis to Singapore. There are no popular flight routes from St. Louis to Singapore.

Search flight deals

Frequently asked questions about flying from St. Louis to Singapore

How far is Lambert-St Louis to Singapore Changi by plane?
Singapore Changi is 9530.1 mi away from Lambert-St Louis. In terms of flight time, this usually takes a little over 28h 51m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Singapore Changi Airport?
Prices for flights from Lambert-St Louis Airport to Singapore Changi Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Singapore Changi Airport?
As of August 2026, there is 1 operator available to choose from for flights from Lambert-St Louis Airport to Singapore Changi Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Singapore Changi Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Singapore Changi Airport.
What documentation or ID do you need to fly to Singapore Changi Airport?
The travel and health documents you'll need for your trip to Singapore Changi Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Singapore Changi Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Singapore?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Singapore is United Airlines (100% of total bookings).

Best airlines flying from St. Louis to Singapore

Compare and see reviews for airlines that fly from St. Louis to Singapore with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $1,094	Free Cancellation	Rating 7.4 10,112 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Singapore?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Singapore for you.

Can I find flights from St. Louis to Singapore with flexible booking policies on momondo?

All flight searches from St. Louis to Singapore on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Singapore?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Singapore.

I’m not ready to book a flight from St. Louis to Singapore right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Singapore, momondo offers a useful price alert feature which will track prices for flights to Singapore from St. Louis and alert you when they change.

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Cheap flights from St. Louis to Singapore from $549

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Singapore departing on 11/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from St. Louis to Singapore

Our best Air Canada deals on St. Louis to Singapore flight tickets

United Airlines flights from St. Louis to Singapore

Our best United Airlines deals on St. Louis to Singapore flight tickets

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How to get the cheapest flight ticket from St. Louis to Singapore

What is the cheapest month to fly to Singapore?

Can stopping save me money on St. Louis to Singapore flights?

What is the cheapest airline that flies from Lambert-St Louis to Singapore Changi?

When to book flights from St. Louis to Singapore

Cheap St. Louis to Singapore (STL to SIN) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Singapore

Best airlines flying from St. Louis to Singapore

Compare and see reviews for airlines that fly from St. Louis to Singapore with momondo

Why use momondo?

An easier way to manage your Singapore trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Singapore

Fly your favorite airline to Singapore

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Singapore

List of cabin classes available on flights landing in Singapore. Availability may vary depending on flight origin and airline.

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