SEA - PNH

Find cheap flights from Seattle to Phnom Penh

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Phnom Penh

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Phnom Penh.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Phnom Penh.
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Everything you should know

Cheapest round-trip
Multiple Airlines
Thu 12/18
SEA - PNH • multi-stop
Cheapest one-way
Multiple Airlines
Thu 12/18
SEA - PNH • multi-stop
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 15% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 23% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Phnom Penh (SEA-PNH)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Phnom Penh that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Phnom Penh

Multiple Airlines Logo
SEA
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PNH
7432 mimulti-stop
Multiple Airlines Logo
PNH
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SEA
7432 mimulti-stop
Multiple Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Phnom Penh flights

Get data-powered insights and trends into flights from Seattle to Phnom Penh to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to Phnom Penh?

The average price of all round-trip flights from Seattle to Phnom Penh clicked on KAYAK for each day over the last 12 months.

When flying from Seattle to Phnom Penh, you should consider leaving on a Tuesday and avoid Sundays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Wednesdays and the most expensive ones on Tuesdays.

What is the cheapest month to fly from Seattle to Phnom Penh?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Phnom Penh, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Phnom Penh is September, where tickets cost $840 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,514 and $1,505 respectively.

How far in advance should I book a flight from Seattle to Phnom Penh?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Phnom Penh, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Phnom Penh, you should book around 2 weeks before departure, which saves you about 15% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonOctober
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 23% increase in price.

When to book flights from Seattle to Phnom Penh

Are your dates flexible? Find out the best times to travel from Seattle to Phnom Penh based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Phnom Penh

  • Americans wishing to enter Cambodia need a visa as well as a passport. You have the option of processing your visa online. Visas for business and tourism are valid for one month from the date that you enter Cambodia. If you are traveling for tourism or business, you may also get your Cambodian visa at the airport in Phnom Penh.

    Can I park my car at Seattle-Tacoma International Airport (SEA) before my flight to Phnom Penh?

  • The best option for parking at SEA is General Parking, which is available on seven different floors of the SEA Garage. You can park on floors one through three and five through eight. You will be able to save some money if you pre-book your parking spot online. If you plan to park for longer than 30 days, you must pre-book online.

    How can I get from Phnom Penh International Airport (PNH) into downtown Phnom Penh?

  • At PNH, you can catch a Phnom Penh City Bus 3-Blue. These buses leave hourly for a 20-minute ride to Phnom Penh City Center PPCC at the DN intersection. In order to take this bus, you need to pay with riel, the local currency. At the arrivals curb, you can also hail a taxi or a tuk tuk, which is a carriage pulled by a motorcycle.

    Which economy tickets from Seattle to Phnom Penh allow me to bring the most luggage?

  • You can find a cheap Saver class ticket on Alaska Airlines switching to China Airlines that allows you one carry-on and two checked bags. A carry-on that is acceptable on both airlines must be within 15 lb and 22 x 14 x 9 inches. The checked bags must each be within 50 lb and 62 total inches in added-up dimensions.

    Can I get assistance because of my hidden disability at the Seattle-Tacoma International Airport?

  • Do I need a passport to fly between Seattle and Phnom Penh?

    Yes, you’ll need a passport to travel to Phnom Penh from Seattle.

  • Which aircraft models fly most regularly from Seattle to Phnom Penh?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Phnom Penh?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Seattle and Phnom Penh, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Phnom Penh from Seattle?

    Seoul is the most popular layover city among KAYAK users traveling from Seattle to Phnom Penh.

  • Which is the best airline for flights from Seattle to Phnom Penh, Korean Air or EVA Air?

    The two airlines most popular with KAYAK users for flights from Seattle to Phnom Penh are Korean Air and EVA Air. With an average price for the route of $937 and an overall rating of 8.4, Korean Air is the most popular choice. EVA Air is also a great choice for the route, with an average price of $1,361 and an overall rating of 8.4.

  • How does KAYAK find such low prices on flights from Seattle to Phnom Penh?

    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 Seattle to Phnom Penh.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Phnom Penh?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Phnom Penh from Seattle 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 Seattle to Phnom Penh?

    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 to Phnom Penh with an airline and back to Seattle with another airline. Booking your flights between Seattle and PNH can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Phnom Penh?

    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 to Phnom Penh from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Phnom Penh

  • Some of the cheapest tickets from TPA to DAC require you to change airports in cities such as Washington DC or New York City. This kind of ticket can be a great bargain. But before you buy it, plan out exactly how you will make the journey from one airport to the other, and make sure the ticket leaves you enough connection time to get the switch done.
  • Seattle-Tacoma International Airport (SEA) is a hub for Alaska, Delta, Horizon Air, and other airlines. Phnom Penh International Airport (PNH), the largest airport in Cambodia, is a hub for Cambodia Angkor Air, Cambodian Airways, and others. Some of the cheapest flights from SEA to PNH involve Alaska or Cambodia anchor air.
  • Cheap tickets that require a self-transfer at a connection city can be a great bargain. However, before you purchase such a ticket, make sure that the connection where you have to make the self-transfer gives you enough time to pass through customs, collect any checked baggage, possibly get to another terminal for the next leg of your flight, and check in and go through security again.
  • If you're looking to leave a small carbon footprint as you fly from SEA to PNH, consider buying a ticket that involves Alaska, an airline often cited as one of the most sustainable in the world. Alaska uses highly advanced navigation systems to reduce the number of miles it has to fly, thus saving fuel. Alaska also uses split scimitar winglets to improve fuel efficiency.
  • One of the cheapest and most comfortable economy flights from SEA to PNH is aboard Japan Airlines, switching to Cambodia Angkor Air. On three legs of this flight, including the longest one, you will have 31 inches of seat pitch, seat-back entertainment, a power and USB outlet, and the option to purchase basic web browsing for a small fee.

Reviews of the top 5 airlines serving from Seattle to Phnom Penh

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Phnom Penh. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Phnom Penh? 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.
8.4
EVA AirOverall score based on 1295 reviews
8.1Food
8.3Comfort
8.6Crew
8.0Entertainment
8.4Boarding
Airline reviews

We were very impressed with the modern plane its amenities, as well as the services of flight attendants.

10.0 ExcellentVip, Dec 2025
LAX - TPE
Read more EVA Air reviews

We were very impressed with the modern plane its amenities, as well as the services of flight attendants.

The crew very accommodating and food too is good. Keep up the good work

The crews are very efficient. Other airlines should learn from them when it comes to boarding and departing from the airplane. They also display efficiency in serving meals. They don't keep the aisles blocked for hours like some other airlines. The food is poor. Generally the food was unrecognizable and poorly prepared. The only thing that made it better than US flag carriers is that there was a fresh fruit bowl with each meal.

Very good service and food. Crew was professional and considerate. Cabin and restrooms were kept clean

EVA! What is going on with your food!?!? Pre pandemic I used to go to Taiwan at least twice a year and always flew EVA — the food was consistently tasty for airplane food. Post pandemic, it’s not great at all. Step it up!

Flight Attendants could have been nicer and food portions could be bigger.

Great experience, comfort and food is delicious. Always great service and one time

The food from Los Angeles to Taipei made me throw up. The flight is also not comfort. But the staffs are very friendly and nice.

Aircraft was late getting to the gate - probably due to weather. We left the gate one hour late and had to wait another hour since we lost our slot in the takeoff queue. Our box was very wet and was falling apart when we got to Clark. It appears that luggage was exposed to weather in TPE while waiting to be loaded. Crew, however, handled the delay well and was able to provide planned service.

I appreciate the email reminders for online check-in which made my entry to the lines less stressful. The flight was on schedule and on time. The baording staff were proactively helpful and approachable. The airplane inflight food, entertainment and comfies as well as provisions are excellent even in the economy seating. The airline transfer was smooth and easy! Luggage safe and intact! Thank you EVA airline for making my trip a reliable safe and comfortable experience.

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

There could have been better spacing of the passengers, it was crowded in some parts of the plane then other while rows were empty

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

Hour late but understandable under the conditions. Taoyuan airport could have clearer signs language wise and more staff to help direct people.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I love my Delta crew, they were so welcoming and helpful.

I absolutely loved my flight from Taipei to LAX. I was originally assigned to a different seat, however one of the stewardess noticed I was uncomfortable in my seat. She offered to move me to a more comfortable setting. Although she didn’t have to do what she did, I am more than grateful and thankful for her doing so. My longer flight felt much more comfortable, just by her taking notice. I really appreciate her.

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

Better organization of boarding procedures. Terrible leadership guiding people to gates.

I did not like how the plane landed. It was not smooth.

Been flying with China Airline over years many times. Good experience with them, no issues.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

Better screens, it would have been nice to have more comfortable seats.

It was great, but my bag was not loaded onto the connecting flight. I'm currently getting it resolved. If this isn't a problem, everything else was excellent.

Very clean ,flight attendants very professional,nice , Boarding was very easy

My luggage didn’t arrive with my flight. Flight was delayed by nearly 2 hours while we sat on the plane and I almost missed my connecting flight and subsequently missed the last train from the airport so it took me another 2 hours to get to my destination after arriving, Crew skipped me several times when offering beverages, and I couldn’t get their attention at times because they wouldn’t even make eye contact with me. They didn’t give me a form for disembarking so I had to go to the back of the line after waiting an eternity for immigration. Paid for on flight wi- fi that didn’t work for most of the flight.

Love flying Asiana. Been using it for over a decade now.

The beefsteak on the lunch menu was excellent! I usually do not eat airplane food. I loved it.

Flight was too cold. I wore a regular cotton tee and it wasn’t enough. It was a night time flight so I would have thought a blanket would be provided to passengers. A 4 hour flight and no options for a meal? I flew Asiana the next day from Seoul to Manilla. Same duration, 4 hours. They give everyone a pillow and blanket and serve a meal. Why is United so cheap and holding back meals and amenities? Also, they promote too much gay stuff and DEI in their advertisements. Please be mindful of other beliefs and don’t shove your gay ideology down my throat.

Staff always with a smile and very helpful with my mom who has mobility issues.

It was amazing. I was not expecting the phenomenal customer service Asiana provides.

It was all perfect and very pleasant for such long flights

a completely full flight - felt quite carmped in, despite being on the window seat. Meal served could better. Surely different from pre-covid trips I used to take to and from Bangkok.

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

Best service airline. The cabin crew is attentive and friendly. Inflight entertainment system is good

I have difficulties to book wheelchair for my parents returned flight

Crew and service excellent. 2 hour delay for takeoff. SQ app showed flight on time.

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

Everything was great keep up the good work 😁, can't ask for more.

Flight from SFO did not include entertainment as it was not working the entire duration of the flight. Was informed that there would be a $350 voucher for the inconvenience. Uncertain how the voucher will be provided.

Everything you need to know for your flight from Seattle to Phnom Penh

Information on your arrival and departure airports