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Cheap flights from Missouri to Siem Reap from $1,551

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 6/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Missouri to Siem Reap

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:56 pm - 9:40 am
STL
-
SAI
49h 44m
2 stops
Multiple Airlines Logo
10:30 am - 11:58 pm
SAI
-
STL
49h 28m
2 stops
$1,551Multiple Airlines
Wed, Jun 3 - Wed, Jun 17
United Airlines Logo
7:06 pm - 9:40 am
STL
-
SAI
26h 34m
2 stops
United Airlines Logo
10:30 am - 5:53 pm
SAI
-
STL
43h 23m
2 stops
$1,678United Airlines
Wed, Jun 3 - Wed, Jun 17
Multiple Airlines Logo
1:00 pm - 6:45 pm
STL
-
SAI
41h 45m
3 stops
Multiple Airlines Logo
7:25 pm - 9:11 pm
SAI
-
STL
37h 46m
3 stops
$1,823Multiple Airlines
Wed, Jun 3 - Wed, Jun 17
Qatar Airways Logo
9:17 am - 12:15 pm
STL
-
SAI
38h 58m
3 stops
Qatar Airways Logo
12:55 pm - 5:03 pm
SAI
-
STL
40h 08m
3 stops
$2,168Qatar Airways
Wed, Jun 3 - Wed, Jun 17

momondo Fare Finder

 
Customize your flight search to find flights from Missouri to Region of Siem Reap 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, momondo users made 832,500 searches. Data last updated February 10, 2026.
Use the filters below to find and compare flights from Missouri to Siem Reap that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Wed 6/3

7:56 pm-9:40 am

2 stops49h 44m

Siem Reap–Angkor Intl

Wed 6/17

10:30 am-11:58 pm

2 stops49h 28m

$1,551

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Wed 6/3

7:06 pm-9:40 am

2 stops26h 34m

Siem Reap–Angkor Intl

Wed 6/17

10:30 am-5:53 pm

2 stops43h 23m

$1,678

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Wed 6/3

1:00 pm-6:45 pm

3 stops41h 45m

Siem Reap–Angkor Intl

Wed 6/17

7:25 pm-9:11 pm

3 stops37h 46m

$1,823

St. LouisSiem Reap

STL - SAI

STLSAI

Lambert-St Louis

Wed 6/3

9:17 am-12:15 pm

3 stops38h 58m

Siem Reap–Angkor Intl

Wed 6/17

12:55 pm-5:03 pm

3 stops40h 08m

$2,168

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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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

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 Kansas City to Siem Reap is 35h 27m on average, while flying from St. Louis to Siem Reap is 49h 44m on average. Siem Reap is the most popular airport in Region of 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

35h 27m

Direct flights

None
The fastest flight from Missouri to Region of Siem Reap takes 35h 27m
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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  • 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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