The cheapest times to fly from IAH to PNH are

  • January 8th to March 4th (except the week of January 29th)
  • April 23rd to May 6th
  • August 20th to December 9th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from IAH to PNH is late January. Prices can be as high as $2557 for Sunday flights during mid December, or as low as $793 for Tuesday flights around late January.


When to Fly to Phnom Penh

Flying from Houston, TX (IAH) to Phnom Penh (PNH) will usually cost between $853 to $1443 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $853. Due to high demand the most expensive time to fly is mid December, with an average price of $1473. Planning your trip to low-cost times can easily save you $620 on economy flights and even more on first-class flights. Generally, any price below $976 can be considered a good price for a round-trip IAH to PNH flight.

See below for a graph of average weekly prices for the IAH to PNH route. All prices are for round-trip tickets in USD.

IAH to PNH Flight Prices

Compared to other flights, the IAH to PNH flight is priced close to the average and costs about as much as the average flight leaving from Houston. The average price per mile (for a direct flight) is $0.07, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to PNH, and Wednesday the cheapest day to fly back into IAH. Sundays are the most expensive days to fly to Phnom Penh, and Thursdays are the most expensive days to return to Houston. Selecting flights on the least expensive days could save you up to $85 (6%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1003. Return trip prices are from the PNH to IAH flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from IAH to PNH can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 17 hour 40 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from IAH to PNH while comparing.

Destination alternative #1: Tan Son Nhat International Airport (SGN) in Ho Chi Minh City

  • 132 miles (212 km) away from PNH
  • Usually 8.87% less expensive than PNH
  • 1-layover flights available

See IAH to SGN flights


Flight Hacking IAH to PNH

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from IAH to PNH — but Champion Traveler does!

Hack #1: Bangkok (IAH > BKK > PNH)

  • Price for both tickets: $919
  • Average savings: $57 (5.84%)

See IAH to BKK flights

Hack #2: Singapore (IAH > SIN > PNH)

  • Price for both tickets: $957
  • Average savings: $19 (1.9%)

See IAH to SIN flights

Hack #3: Kuala Lumpur (IAH > KUL > PNH)

  • Price for both tickets: $959
  • Average savings: $17 (1.74%)

See IAH to KUL flights


Flight Questions Answered

Still have questions about flying from IAH to PNH? We’ve got answers.

Which airlines fly this route?

You can find 30 major airlines flying this route most often: Air Canada, Air China, Alaska, American, ANA, Asiana, Austrian, Bangkok Airways, British Airways, Brussels Airlines, Cathay Dragon, Cathay Pacific, China Airlines, China Southern, Delta, Emirates, Etihad, EVA Air, Fiji Airways, JAL, KLM, Korean Air, Lufthansa, Qatar Airways, Shenzhen, Singapore Airlines, THAI, United, Vietnam Airlines, Xiamen, and potentially more during busy seasons.

How far away is it from Phnom Penh International Airport to George Bush Intercontinental/Houston Airport?

The distance between the two airports is roughly 9267 miles or 14914 kilometers.

How long does it take to fly from IAH to PNH?

The real-world flight time for a nonstop IAH to PNH flight is about 17 hour 40 minutes.

How many flights go between Houston, TX and Phnom Penh?

It depends on the day of the week and the date, but a typical day might have around 62 available flights from IAH to PNH.


Airport Location Info


Departing Airport

Origination code IAH
Origination airport name George Bush Intercontinental/Houston Airport
City Houston, TX
Country the United States
Latitude 30
Longitude -95.3

Return Airport

Destination code PNH
Destination airport name Phnom Penh International Airport
City Phnom Penh
Country Cambodia
Latitude 11.5
Longitude 104.8


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.