How long is the flight from Missouri to Region of Siem Reap?

Average flight duration from Missouri to Region of Siem Reap depends on which airport you fly into and out of. Flying from St. Louis to Siem Reap is 38h 40m on average, while flying from Kansas City to Siem Reap is 39h 29m on average. Siem Reap is the most popular airport in Region of Siem Reap.

When did momondo last update prices for flights from Missouri to Siem Reap?

Prices for flights from Missouri to Siem Reap are refreshed on a daily basis.

How old do you have to be to fly from Missouri to Siem Reap?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Siem Reap.

What documentation or ID do you need to fly to Siem Reap?

The travel and health documents required for your trip to Siem Reap can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$1,380 Cheap Flights from Missouri to Siem Reap in 2026

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Find the cheapest flights from Missouri to Siem Reap

Round-trip

One-way

Cheap round-trip flights

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3:17 pm - 9:40 am

STL

SAI

54h 23m

2 stops

10:45 am - 11:59 pm

SAI

STL

49h 14m

2 stops

$1,380Multiple Airlines

Wed, Sep 30 - Mon, Oct 26

7:34 pm - 9:40 am

STL

SAI

50h 06m

2 stops

4:45 pm - 11:59 pm

SAI

STL

43h 14m

2 stops

$1,438Multiple Airlines

Mon, Sep 28 - Mon, Oct 26

7:00 am - 9:40 am

STL

SAI

38h 40m

2 stops

4:45 pm - 5:53 pm

SAI

STL

37h 08m

2 stops

$1,634Singapore Airlines

Tue, Sep 29 - Tue, Oct 27

7:00 am - 9:40 am

STL

SAI

38h 40m

2 stops

6:40 pm - 4:35 pm

SAI

STL

33h 55m

3 stops

$1,647Multiple Airlines

Tue, Sep 29 - Tue, Oct 27

2:45 pm - 12:15 pm

STL

SAI

33h 30m

3 stops

7:25 pm - 10:00 pm

SAI

STL

38h 35m

3 stops

$1,685Qatar Airways

Tue, Sep 29 - Tue, Oct 27

3:05 pm - 9:30 pm

STL

SAI

42h 25m

3 stops

11:50 pm - 10:06 pm

SAI

STL

34h 16m

3 stops

$1,907Emirates

Tue, Sep 29 - Thu, Oct 29

8:15 pm - 9:30 pm

STL

SAI

61h 15m

3 stops

11:50 pm - 9:09 pm

SAI

STL

33h 19m

3 stops

$2,080Emirates

Mon, Sep 28 - Tue, Oct 27

3:30 pm - 9:40 am

STL

SAI

54h 10m

2 stops

4:45 pm - 2:55 pm

SAI

STL

34h 10m

2 stops

$2,884Lufthansa

Sun, Sep 27 - Tue, Oct 27

3:30 pm - 9:40 am

STL

SAI

54h 10m

2 stops

10:30 am - 2:55 pm

SAI

STL

40h 25m

2 stops

$3,088Lufthansa

Mon, Sep 28 - Sat, Oct 24

3:05 pm - 9:30 pm

STL

SAI

42h 25m

3 stops

11:50 pm - 10:06 pm

SAI

STL

34h 16m

3 stops

$3,132Emirates

Tue, Sep 29 - Sat, Oct 24

Emirates flights from Missouri to Region of Siem Reap

Our best Emirates deals on Missouri to Region of Siem Reap flight tickets

Emirates

Sep 29

STL3:05 pmLambert-St Louis

42h 25m

3 stops

SAI9:30 pmSiem Reap–Angkor Intl

Oct 29

SAI11:50 pmSiem Reap–Angkor Intl

34h 16m

3 stops

STL10:06 pmLambert-St Louis

$1,907

Emirates

Sep 28

STL8:15 pmLambert-St Louis

61h 15m

3 stops

SAI9:30 pmSiem Reap–Angkor Intl

Oct 27

SAI11:50 pmSiem Reap–Angkor Intl

33h 19m

3 stops

STL9:09 pmLambert-St Louis

$2,080

Emirates

Sep 29

STL3:05 pmLambert-St Louis

42h 25m

3 stops

SAI9:30 pmSiem Reap–Angkor Intl

Oct 24

SAI11:50 pmSiem Reap–Angkor Intl

34h 16m

3 stops

STL10:06 pmLambert-St Louis

$3,132

Lufthansa flights from Missouri to Region of Siem Reap

Our best Lufthansa deals on Missouri to Region of Siem Reap flight tickets

Lufthansa

Sep 27

STL3:30 pmLambert-St Louis

54h 10m

2 stops

SAI9:40 amSiem Reap–Angkor Intl

Oct 27

SAI4:45 pmSiem Reap–Angkor Intl

34h 10m

2 stops

STL2:55 pmLambert-St Louis

$2,884

Lufthansa

Sep 28

STL3:30 pmLambert-St Louis

54h 10m

2 stops

SAI9:40 amSiem Reap–Angkor Intl

Oct 24

SAI10:30 amSiem Reap–Angkor Intl

40h 25m

2 stops

STL2:55 pmLambert-St Louis

$3,088

Lufthansa

Sep 27

STL3:30 pmLambert-St Louis

54h 10m

2 stops

SAI9:40 amSiem Reap–Angkor Intl

Oct 24

SAI10:30 amSiem Reap–Angkor Intl

40h 25m

2 stops

STL2:55 pmLambert-St Louis

$3,163

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Wed 9/30

3:17 pm-9:40 am

2 stops54h 23m

Siem Reap–Angkor Intl

Mon 10/26

10:45 am-11:59 pm

2 stops49h 14m

$1,380

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Mon 9/28

7:34 pm-9:40 am

2 stops50h 06m

Siem Reap–Angkor Intl

Mon 10/26

4:45 pm-11:59 pm

2 stops43h 14m

$1,438

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Tue 9/29

7:00 am-9:40 am

2 stops38h 40m

Siem Reap–Angkor Intl

Tue 10/27

4:45 pm-5:53 pm

2 stops37h 08m

$1,634

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Tue 9/29

7:00 am-9:40 am

2 stops38h 40m

Siem Reap–Angkor Intl

Tue 10/27

6:40 pm-4:35 pm

3 stops33h 55m

$1,647

Quickest round-trip

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Tue 9/29

2:45 pm-12:15 pm

3 stops33h 30m

Siem Reap–Angkor Intl

Tue 10/27

7:25 pm-10:00 pm

3 stops38h 35m

$1,685

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Tue 9/29

3:05 pm-9:30 pm

3 stops42h 25m

Siem Reap–Angkor Intl

Thu 10/29

11:50 pm-10:06 pm

3 stops34h 16m

$1,907

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Mon 9/28

8:15 pm-9:30 pm

3 stops61h 15m

Siem Reap–Angkor Intl

Tue 10/27

11:50 pm-9:09 pm

3 stops33h 19m

$2,080

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Sun 9/27

3:30 pm-9:40 am

2 stops54h 10m

Siem Reap–Angkor Intl

Tue 10/27

4:45 pm-2:55 pm

2 stops34h 10m

$2,884

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Mon 9/28

3:30 pm-9:40 am

2 stops54h 10m

Siem Reap–Angkor Intl

Sat 10/24

10:30 am-2:55 pm

2 stops40h 25m

$3,088

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Tue 9/29

3:05 pm-9:30 pm

3 stops42h 25m

Siem Reap–Angkor Intl

Sat 10/24

11:50 pm-10:06 pm

3 stops34h 16m

$3,132

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 Missouri to Region of Siem Reap

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

Airlines

Other information

What is the cheapest airline that flies from Missouri to Siem Reap?

Qatar Airways and United Airlines are the most popular carriers operating from Missouri to Siem Reap

Cheap Missouri to Region of Siem Reap flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Missouri to Region of Siem Reap

Fastest flight time	38h 40m
Direct flights	None

The fastest flight from Missouri to Region of Siem Reap takes 38h 40m

There are no direct flights from Missouri to Region of Siem Reap. There are no popular flight routes from Missouri to Region of Siem Reap.

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Frequently asked questions about flying from Missouri to Siem Reap

When did momondo last update prices for flights from Missouri to Siem Reap?
Prices for flights from Missouri to Siem Reap are refreshed on a daily basis.
How old do you have to be to fly from Missouri to Siem Reap?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri to Siem Reap.
What documentation or ID do you need to fly to Siem Reap?
The travel and health documents required for your trip to Siem Reap can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Siem Reap. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from Missouri to Siem Reap?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Missouri to Siem Reap. momondo saves you time and could save you money on your trip.

Can I find flights from Missouri to Siem Reap with flexible booking policies on momondo?

momondo does allow users to show only those flights to Siem Reap from Missouri which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Missouri to Siem Reap?

Once all potential Missouri to Siem Reap flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Missouri to Siem Reap right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Siem Reap from Missouri. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Cheap flights from Missouri to Siem Reap from $1,380

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Siem Reap departing on 9/30. 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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Emirates flights from Missouri to Region of Siem Reap

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Cheap Missouri to Region of Siem Reap flight deals and tips

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Frequently asked questions about flying from Missouri to Siem Reap

Why use momondo?

An easier way to manage your Region of Siem Reap 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 Siem Reap

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Popular flights according to clicks in the last 7 days on momondo

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

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According to popular flight searches on momondo this year