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Cheap flights from St. Louis to Singapore from S$ 822

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 26-7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SIN
18 Jun — 25 Jun1
1 adult

Cheap flight deals from St. Louis to Singapore

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Singapore (SIN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 13 June 2025.

Round-trip from

S$ 1,357

One-way from

S$ 822

Popular in

August

Cheapest in

September

Average price

S$ 2,039
Air Canada
  • Air Canada
  • 30-8-12-9
  • 4 total stops
  • 101h 22m total
  • St. Louis to Singapore
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United Airlines
  • United Airlines
  • 26-7
  • 2 total stops
  • 59h 55m total
  • St. Louis to Singapore
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease (S$ 71 potential savings vs. average return price).
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Average for round-trip flights in June 2025
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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 13 June 2025.

Sat 30-813:30STL - SIN
2 stops52h 35mAir Canada
Fri 12-908:10SIN - STL
2 stops48h 47mAir Canada
Deal found 11-6S$ 1,357
Tue 22-711:18STL - SIN
2 stops23h 22mDelta
Sun 17-801:10SIN - STL
2 stops35h 04mDelta
Deal found 12-6S$ 1,420
Thu 24-706:00STL - SIN
1 stop23h 25mUnited Airlines
Wed 13-808:45SIN - STL
1 stop21h 00mUnited Airlines
Deal found 12-6S$ 1,421
Thu 24-708:00STL - SIN
2 stops33h 40mANA
Wed 13-806:15SIN - STL
2 stops45h 22mANA
Deal found 12-6S$ 1,505
Sat 30-805:15STL - SIN
2 stops30h 05mAmerican Airlines
Thu 11-901:55SIN - STL
2 stops29h 32mAmerican Airlines
Deal found 11-6S$ 1,559
Sat 30-817:49STL - SIN
3 stops29h 11mMultiple Airlines
Fri 12-913:10SIN - STL
2 stops38h 29mMultiple Airlines
Deal found 11-6S$ 2,056
Thu 19-615:24STL - SIN
2 stops31h 36mEVA Air
Sat 5-715:10SIN - STL
2 stops40h 25mEVA Air
Deal found 11-6S$ 2,090
Tue 29-711:18STL - SIN
2 stops28h 42mKorean Air
Sun 10-801:10SIN - STL
2 stops36h 28mKorean Air
Deal found 12-6S$ 2,144
Wed 2-706:41STL - SIN
2 stops37h 19mQatar Airways
Tue 15-703:10SIN - STL
2 stops33h 49mQatar Airways
Deal found 11-6S$ 2,285
Thu 19-615:24STL - SIN
2 stops44h 11mChina Airlines
Fri 4-702:00SIN - STL
2 stops58h 59mChina Airlines
Deal found 12-6S$ 2,394
Thu 26-617:30STL - SIN
2 stops33h 00mKLM
Sat 28-600:40SIN - STL
2 stops26h 57mKLM
Deal found 13-6S$ 2,446
Thu 25-908:50STL - SIN
2 stops26h 30mJapan Airlines
Wed 8-1021:50SIN - STL
2 stops38h 03mJapan Airlines
Deal found 12-6S$ 2,473

Cheapflights Fare Finder

Customise 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 200,618 searches. Data last updated 13 June 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

Sat 30-8

13:30-07:05

2 stops52h 35m

Singapore Changi

Fri 12-9

08:10-19:57

2 stops48h 47m

S$ 1,357

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 22-7

11:18-23:40

2 stops23h 22m

Singapore Changi

Sun 17-8

01:10-23:14

2 stops35h 04m

S$ 1,420

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 24-7

06:00-18:25

1 stop23h 25m

Singapore Changi

Wed 13-8

08:45-16:45

1 stop21h 00m

S$ 1,421

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 24-7

08:00-06:40

2 stops33h 40m

Singapore Changi

Wed 13-8

06:15-14:37

2 stops45h 22m

S$ 1,505

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 30-8

05:15-00:20

2 stops30h 05m

Singapore Changi

Thu 11-9

01:55-18:27

2 stops29h 32m

S$ 1,559

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sat 30-8

17:49-12:00

3 stops29h 11m

Singapore Changi

Fri 12-9

13:10-14:39

2 stops38h 29m

S$ 2,056

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Tue 29-7

11:18-05:00

2 stops28h 42m

Singapore Changi

Sun 10-8

01:10-00:38

2 stops36h 28m

S$ 2,144

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Wed 2-7

06:41-09:00

2 stops37h 19m

Singapore Changi

Tue 15-7

03:10-23:59

2 stops33h 49m

S$ 2,285

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 26-6

17:30-15:30

2 stops33h 00m

Singapore Changi

Sat 28-6

00:40-14:37

2 stops26h 57m

S$ 2,446

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Thu 25-9

08:50-00:20

2 stops26h 30m

Singapore Changi

Wed 8-10

21:50-22:53

2 stops38h 03m

S$ 2,473

Flights are sorted by cheapest return flights first.

Deals found on 11-6

Showing 1-10 of 11 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 return 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

Rainfall in Singapore by month

Plan your trip to Singapore by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Singapore ranges from 150.0 - 269.0 inches per month. December is typically the wettest month, when rainfall can reach 269.0 mm. July is typically the driest time to visit Singapore when rainfall is around 150.0 mm.

Temperature in Singapore by month

Plan your trip to Singapore by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Singapore, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 26.0 C).

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 13 June 2025.
Get a feel of what it's like to fly with Korean Air, Japan Airlines and ANA from St. Louis to Singapore by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very Good
1,091 reviews
Check prices

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very Good
1,091 reviews
Korean Air
8.4
Very Good
1,091 reviews
Check prices

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very Good
1,490 reviews
Korean Air
8.4
Very Good
1,091 reviews
Check prices

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very Good
882 reviews
Korean Air
8.4
Very Good
1,091 reviews
Check prices

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very Good
7,946 reviews
Korean Air
8.4
Very Good
1,091 reviews
Check prices

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
KLM
7.8
Good
1,358 reviews
Korean Air
8.4
Very Good
1,091 reviews
Check prices

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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 are the cheapest airlines flying from St. Louis to Singapore round-trip?

    Cheapflights users have booked flights from St. Louis to Singapore round-trip from S$ 1,357. Other airlines that can offer you cheap pricing are Delta, from S$ 1,420, and United Airlines, from S$ 1,421. Air Canada is priced at 28% lower than the current average price of a flight leaving 3 months from now.

  • 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 holiday 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.

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