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

Qatar Airways, United Airlines, and Delta are the most popular carriers 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 November 2025, 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.

$537 Cheap Flights from St. Louis to Singapore in 2025/26

Q: What is the typical price of a round-trip flight between St. Louis and Singapore?

Prices are currently low for flights on this route. Typical prices usually range from $1,167 to $1,339. The lowest price recently found on this route was $994.

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11:05 am - 4:50 pmSTL-SIN

39h 45m2 stops

7:40 am - 9:15 pmSIN-STL

27h 35m2 stops

$994Cathay Pacific

Find Deal

qua, jan 14 - seg, fev 2

11:05 am - 3:45 pmSTL-SIN

38h 40m2 stops

4:45 pm - 6:14 pmSIN-STL

39h 29m2 stops

$1,094Cathay Pacific

Find Deal

sex, jan 16 - sáb, jan 31

10:03 am - 8:45 amSTL-SIN

32h 42m2 stops

3:15 am - 10:11 pmSIN-STL

32h 56m2 stops

$1,107Qatar Airways

Find Deal

qui, fev 19 - seg, mar 2

2:45 pm - 8:00 amSTL-SIN

27h 15m2 stops

10:10 am - 10:14 pmSIN-STL

26h 04m3 stops

$1,129United Airlines

Find Deal

qui, fev 19 - ter, mar 3

5:59 pm - 11:55 amSTL-SIN

28h 56m2 stops

2:05 pm - 5:57 pmSIN-STL

40h 52m2 stops

$1,149Cathay Pacific

Find Deal

dom, mar 8 - qui, mar 12

2:55 pm - 5:45 pmSTL-SIN

36h 50m1 stop

9:00 am - 11:56 pmSIN-STL

28h 56m1 stop

$1,155Multiple Airlines

Find Deal

qui, fev 19 - ter, mar 3

6:00 pm - 8:15 pmSTL-SIN

36h 15m2 stops

10:20 pm - 5:11 amSIN-STL

20h 51m1 stop

$1,229United Airlines

Find Deal

sex, jan 16 - sáb, jan 31

3:50 pm - 5:00 pmSTL-SIN

35h 10m1 stop

2:45 am - 11:59 pmSIN-STL

35h 14m2 stops

$1,556Lufthansa

Find Deal

qua, jan 14 - dom, fev 1

3:50 pm - 6:50 amSTL-SIN

25h 00m1 stop

11:55 pm - 10:58 pmSIN-STL

37h 03m2 stops

$1,557Lufthansa

Find Deal

qua, jan 14 - seg, fev 2

7:00 am - 9:55 pmSTL-SIN

48h 55m2 stops

8:50 am - 5:39 pmSIN-STL

22h 49m2 stops

$1,574Multiple Airlines

Find Deal

qui, nov 20 - ter, nov 25

Cathay Pacific flights from St. Louis to Singapore

Our best Cathay Pacific deals on St. Louis to Singapore flight tickets

Cathay Pacific

Jan 14

STL11:05 amLambert-St Louis

39h 45m

2 stops

SIN4:50 pmSingapore Changi

Feb 2

SIN7:40 amSingapore Changi

27h 35m

2 stops

STL9:15 pmLambert-St Louis

$994

Find similar

Cathay Pacific

Jan 16

STL11:05 amLambert-St Louis

38h 40m

2 stops

SIN3:45 pmSingapore Changi

Jan 31

SIN4:45 pmSingapore Changi

39h 29m

2 stops

STL6:14 pmLambert-St Louis

$1,094

Find similar

Cathay Pacific

Mar 8

STL5:59 pmLambert-St Louis

28h 56m

2 stops

SIN11:55 amSingapore Changi

Mar 12

SIN2:05 pmSingapore Changi

40h 52m

2 stops

STL5:57 pmLambert-St Louis

$1,149

Find similar

Lufthansa flights from St. Louis to Singapore

Our best Lufthansa deals on St. Louis to Singapore flight tickets

Lufthansa

Jan 14

STL3:50 pmLambert-St Louis

35h 10m

1 stop

SIN5:00 pmSingapore Changi

Feb 1

SIN2:45 amSingapore Changi

35h 14m

2 stops

STL11:59 pmLambert-St Louis

$1,556

Find similar

Lufthansa

Jan 14

STL3:50 pmLambert-St Louis

25h 00m

1 stop

SIN6:50 amSingapore Changi

Feb 2

SIN11:55 pmSingapore Changi

37h 03m

2 stops

STL10:58 pmLambert-St Louis

$1,557

Find similar

Lufthansa

Mar 8

STL4:50 pmLambert-St Louis

25h 00m

1 stop

SIN6:50 amSingapore Changi

Mar 12

SIN11:55 pmSingapore Changi

28h 00m

1 stop

STL2:55 pmLambert-St Louis

$3,790

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

qua 1/14

11:05 am-4:50 pm

2 stops39h 45m

Singapore Changi

seg 2/2

7:40 am-9:15 pm

2 stops27h 35m

$994

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

sex 1/16

11:05 am-3:45 pm

2 stops38h 40m

Singapore Changi

sáb 1/31

4:45 pm-6:14 pm

2 stops39h 29m

$1,094

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

qui 2/19

10:03 am-8:45 am

2 stops32h 42m

Singapore Changi

seg 3/2

3:15 am-10:11 pm

2 stops32h 56m

$1,107

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

qui 2/19

2:45 pm-8:00 am

2 stops27h 15m

Singapore Changi

ter 3/3

10:10 am-10:14 pm

3 stops26h 04m

$1,129

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

dom 3/8

5:59 pm-11:55 am

2 stops28h 56m

Singapore Changi

qui 3/12

2:05 pm-5:57 pm

2 stops40h 52m

$1,149

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

qui 2/19

2:55 pm-5:45 pm

1 stop36h 50m

Singapore Changi

ter 3/3

9:00 am-11:56 pm

1 stop28h 56m

$1,155

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

sex 1/16

6:00 pm-8:15 pm

2 stops36h 15m

Singapore Changi

sáb 1/31

10:20 pm-5:11 am

1 stop20h 51m

$1,229

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

qua 1/14

3:50 pm-5:00 pm

1 stop35h 10m

Singapore Changi

dom 2/1

2:45 am-11:59 pm

2 stops35h 14m

$1,556

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

qua 1/14

3:50 pm-6:50 am

1 stop25h 00m

Singapore Changi

seg 2/2

11:55 pm-10:58 pm

2 stops37h 03m

$1,557

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

qui 11/20

7:00 am-9:55 pm

2 stops48h 55m

Singapore Changi

ter 11/25

8:50 am-5:39 pm

2 stops22h 49m

$1,574

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 typical price of a round-trip flight between St. Louis and Singapore?

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from St. Louis to Singapore is on a Tuesday when prices can be found for as low as $1,370. The most expensive day to fly to Singapore is Saturday, with ticket prices averaging around $1,691.

What is the cheapest time of day to depart on your flight to Singapore?

In the evening is the cheapest time of day to fly from St. Louis to Singapore when you can find flight prices for as low as $1,420. Flying to Singapore in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,572 on average. Flights to Singapore from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Direct flights	None

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

Search flight deals

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 25h 00m.
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 November 2025, 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 9,007 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.

An easier way to manage your Singapore trip

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Cheap flights from St. Louis to Singapore from $537

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 3/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Price Alerts

Price Alerts

Find the cheapest flights from St. Louis to Singapore

Cheap round-trip flights

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Cathay Pacific flights from St. Louis to Singapore

Our best Cathay Pacific deals on St. Louis to Singapore flight tickets

Lufthansa flights from St. Louis to Singapore

Our best Lufthansa deals on St. Louis to Singapore flight tickets

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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

What is the typical price of a round-trip flight between St. Louis and Singapore?

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from St. Louis to Singapore is on a Tuesday when prices can be found for as low as $1,370. The most expensive day to fly to Singapore is Saturday, with ticket prices averaging around $1,691.

What is the cheapest time of day to depart on your flight to Singapore?

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

Qatar Airways, United Airlines, and Delta are the most popular carriers operating 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

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

Direct flights

How far is Lambert-St Louis to Singapore Changi by plane?

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

How many operators does momondo search 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?

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

What is the most popular airline 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?

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

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

How can momondo help me find flights 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?

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