How does KAYAK find such low prices on flights from Denver to Siem Reap?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Siem Reap.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Siem Reap?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Denver to Siem Reap is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Denver to Siem Reap?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Denver to Siem Reap with an airline and back with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Siem Reap?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Denver to Siem Reap up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$586 CHEAP FLIGHTS from Denver to Siem Reap

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Book Cheap Denver to Siem Reap Plane Tickets

Discover the best prices for you by selecting your travel dates on KAYAK.

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Recent round-trip flight deals from Denver to Siem Reap

Thu, Mar 4 - Tue, Mar 16

7:58 am - 4:00 pmDEN Denver Intl-SAI Siem Reap–Angkor Intl

42h 02m2 stops Los Angeles Singapore Changi

10:45 am - 5:50 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

44h 05m2 stops Singapore Changi Los Angeles

$1,316Singapore Airlines

Thu, Mar 4 - Tue, Mar 16

7:58 am - 4:00 pmDEN Denver Intl-SAI Siem Reap–Angkor Intl

42h 02m2 stops Los Angeles Singapore Changi

10:45 am - 5:50 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

44h 05m3 stops Singapore Changi Tokyo Narita Los Angeles

$1,319Singapore Airlines

Mon, Feb 15 - Mon, Feb 22

10:41 am - 9:55 amDEN Denver Intl-SAI Siem Reap–Angkor Intl

33h 14m3 stops New York John F Kennedy Intl Frankfurt am Main Singapore Changi

10:45 am - 5:50 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

45h 05m2 stops Singapore Changi Los Angeles

$1,325Singapore Airlines

Mon, Feb 15 - Mon, Feb 22

10:41 am - 9:55 amDEN Denver Intl-SAI Siem Reap–Angkor Intl

33h 14m3 stops New York John F Kennedy Intl Frankfurt am Main Singapore Changi

4:50 pm - 5:50 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

39h 00m3 stops Singapore Changi Tokyo Narita Los Angeles

$1,328Singapore Airlines

Mon, Feb 15 - Mon, Feb 22

10:41 am - 9:55 amDEN Denver Intl-SAI Siem Reap–Angkor Intl

33h 14m3 stops New York John F Kennedy Intl Frankfurt am Main Singapore Changi

10:45 am - 5:50 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

45h 05m2 stops Singapore Changi Los Angeles

$1,379Singapore Airlines

Mon, Feb 15 - Mon, Feb 22

10:41 am - 9:55 amDEN Denver Intl-SAI Siem Reap–Angkor Intl

33h 14m3 stops New York John F Kennedy Intl Frankfurt am Main Singapore Changi

4:50 pm - 5:50 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

39h 00m3 stops Singapore Changi Tokyo Narita Los Angeles

$1,382Singapore Airlines

Mon, Jan 4 - Mon, Jan 25

7:50 am - 4:00 pmDEN Denver Intl-SAI Siem Reap–Angkor Intl

42h 10m2 stops Los Angeles Singapore Changi

10:45 am - 5:50 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

45h 05m2 stops Singapore Changi Los Angeles

$1,418Singapore Airlines

Mon, Jan 4 - Mon, Jan 25

7:50 am - 4:00 pmDEN Denver Intl-SAI Siem Reap–Angkor Intl

42h 10m2 stops Los Angeles Singapore Changi

10:45 am - 5:50 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

45h 05m3 stops Singapore Changi Tokyo Narita Los Angeles

$1,422Singapore Airlines

Thu, Mar 4 - Tue, Mar 16

9:00 am - 9:10 pmDEN Denver Intl-SAI Siem Reap–Angkor Intl

46h 10m3 stops Seattle/Tacoma Intl Dubai Intl Bangkok Suvarnabhumi

11:50 pm - 10:40 pmSAI Siem Reap–Angkor Intl-DEN Denver Intl

35h 50m3 stops Bangkok Suvarnabhumi Dubai Intl Seattle/Tacoma Intl

$1,586Multiple Airlines

Thu, Feb 25 - Sat, Mar 6

12:49 pm - 5:40 pmDEN Denver Intl-SAI Siem Reap–Angkor Intl

38h 51m3 stops San Diego San Francisco Ho Chi Minh City

3:10 pm - 11:34 amSAI Siem Reap–Angkor Intl-DEN Denver Intl

34h 24m3 stops Ho Chi Minh City San Francisco San Diego

$1,653Multiple Airlines

Useful Info

How does KAYAK find such low prices on flights from Denver to Siem Reap?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Siem Reap.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Siem Reap?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Denver to Siem Reap is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Denver to Siem Reap?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Denver to Siem Reap with an airline and back with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Siem Reap?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Denver to Siem Reap up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Denver to Siem Reap

Need help choosing which airline to fly with from Denver to Siem Reap? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.

8.2

Singapore AirlinesOverall score based on 1593 reviews

8.0Comfort

7.8Food

8.6Crew

8.3Boarding

8.1Entertainment

Airline reviews

I had selected seats together for my family of three when I first booked my tickets in February. However, I realized only when I checked in at the airport that the seats I had selected were no longer assigned to us and we were completely scattered across three different middle seats instead of being seated together! After requesting the Singapore staff to have us seated together on a full flight, they managed to find something but it was right next to the rest rooms and the whole journey of 15+ hours was really unpleasant. They said that the seat selection isn't locked and the airline can reallocate the seats anytime. No one ever told us this and it was a terribly unpleasant surprise. Will avoid Kayak/underpricer and Singapore in future

2.0 MediocreAnonymous, Jun 2026

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$586 Find Cheap Flights from Denver to Siem Reap - Compare and Save

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