SEA - PNH

$514 Find Cheap Flights from Seattle to Phnom Penh

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Phnom Penh departing on 5/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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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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Cheap Flight Deals 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.

Recent round-trip flight deals from Seattle to Phnom Penh

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Phnom Penh.
Discover the best prices for you by selecting your travel dates on KAYAK.
Philippine Airlines Logo
11:35 pm - 12:15 amSEA-PNH
34h 40m1 stop
Philippine Airlines Logo
1:15 am - 7:15 pmPNH-SEA
32h 00m1 stop
$709Philippine Airlines
Find Deal
Wed, Sep 3 - Tue, Sep 9
Singapore Airlines Logo
10:15 am - 8:40 amSEA-PNH
32h 25m1 stop
Singapore Airlines Logo
9:35 am - 8:45 amPNH-SEA
37h 10m1 stop
$856Singapore Airlines
Find Deal
Thu, Sep 4 - Mon, Oct 6
Asiana Airlines Logo
2:15 pm - 10:55 pmSEA-PNH
18h 40m1 stop
Asiana Airlines Logo
11:55 pm - 12:30 pmPNH-SEA
26h 35m1 stop
$909Asiana Airlines
Find Deal
Wed, Sep 3 - Wed, Sep 10
Asiana Airlines Logo
2:15 pm - 10:55 pmSEA-PNH
18h 40m1 stop
Asiana Airlines Logo
11:55 pm - 12:30 pmPNH-SEA
26h 35m1 stop
$949Asiana Airlines
Find Deal
Mon, Sep 8 - Thu, Sep 18
China Airlines Logo
1:40 am - 9:50 amSEA-PNH
18h 10m1 stop
China Airlines Logo
5:10 pm - 7:20 pmPNH-SEA
16h 10m1 stop
$976China Airlines
Find Deal
Mon, Sep 1 - Thu, Oct 2
Korean Air Logo
5:59 pm - 10:10 pmSEA-PNH
38h 11m2 stops
Korean Air Logo
11:30 pm - 10:40 amPNH-SEA
25h 10m1 stop
$1,032Korean Air
Find Deal
Wed, Sep 3 - Wed, Sep 10
Korean Air Logo
6:15 am - 10:10 pmSEA-PNH
25h 55m2 stops
Korean Air Logo
11:30 pm - 10:23 pmPNH-SEA
36h 53m2 stops
$1,043Korean Air
Find Deal
Thu, Sep 4 - Mon, Oct 6
EVA Air Logo
1:30 am - 11:15 amSEA-PNH
19h 45m1 stop
EVA Air Logo
12:35 pm - 7:30 pmPNH-SEA
20h 55m1 stop
$1,058EVA Air
Find Deal
Sun, Sep 7 - Thu, Sep 18
EVA Air Logo
2:20 pm - 11:15 amSEA-PNH
30h 55m2 stops
EVA Air Logo
12:35 pm - 7:30 pmPNH-SEA
20h 55m1 stop
$1,064EVA Air
Find Deal
Mon, Sep 8 - Thu, Sep 18
China Airlines Logo
1:40 am - 9:50 amSEA-PNH
18h 10m1 stop
China Airlines Logo
5:10 pm - 10:30 amPNH-SEA
31h 20m2 stops
$1,351China Airlines
Find Deal
Mon, Jul 14 - Mon, Aug 18
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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 January, where tickets cost $898 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,589 and $1,533 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. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonJune
High seasonNovember
Cheapest flight$514
Best time to beat the crowds but there is an average 38% increase in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Seattle to Phnom Penh

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?

  • What is the cheapest flight from Seattle to Phnom Penh?

    In the last 3 days, the lowest price for a flight from Seattle to Phnom Penh was $514 for a one-way ticket and $709 for a round-trip.

  • 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?

    SkyTeam, Star Alliance, and oneworld 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, EVA Air or Korean Air?

    The two airlines most popular with KAYAK users for flights from Seattle to Phnom Penh are EVA Air and Korean Air. With an average price for the route of $1,257 and an overall rating of 8.4, EVA Air is the most popular choice. Korean Air is also a great choice for the route, with an average price of $973 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.

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 1186 reviews
8.4Boarding
8.1Food
8.3Comfort
8.0Entertainment
8.6Crew
Airline reviews

For the price, it was better than other airlines; quality of food and service was very good.

8.0 ExcellentAnonymous, Mar 2025TPE - LAX
Read more EVA Air reviews

For the price, it was better than other airlines; quality of food and service was very good.

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.

I was sleep when they brought the food. They had put a note on my seat. There was no food when I asked for food later. There was just one main meal served in this 14 hours flight. They offered me sandwich with ham which I don’t eat since I am pescatarian. Long story short I had to wait to get to TPE to get something to eat. I am extremely disappointed from the service. I have been flying EVA since I was 1 year old. Perhaps no more EVA for me. Seems EVA glorious day is long gone

The app was awful. No accurate info. Paying for internet is a negative (Delta is free). The crew was very nice for the most part although you are not guaranteed to get good service. Some crew would ignore requests for things as simple as a cup of water if you were sleeping when the first serving was made. Food was great. Male crew member was exceptionally kind and responsive.

Good experience but could be better for people with injuries and needing extra assistance

It was a good flight. I would highly recommend it to family and friends.

The employees were professional and efficient. I consider myself a traveler but have trouble with the international fare served on airplanes. I admit Americans buy their food in the supermarket and we typically don’t eat the ligaments and cartilage. I know that is whiny but as I age, I dislike it more. At least things weren’t covered in cheese. The desserts are terrible! My neighbor didn’t eat her bread so I asked if I could have it. First time for everything but had been traveling a total of 27 hours and was hungry.

The night flight was only 2/3 full, which is always a plus. Room to stretch out for sleeping. Gracious stewardesses, attentive, and slim/attractive (which is rare these days). Good food, and curtesy wine.with meals. Comfortable seats and decent leg room (economy class)

On time service. Seat comfort and the crew service very good .

Only one Hindi movie from LAvto Taipei and same movie from Taipei to Singapore Really horrible and we call it entertainment???

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

They did an excellent job helping me with a wheelchair. I couldn’t have asked for any better help.

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

The flight was on time and very quick, as expected, but the leg room isn't great in coach seats.

Just a typical domestic poor flight nothing more. There is no food choices in such a flight. Crew doesn't really care if you are on-board or not

long flights are difficult but the crew and amenities made it a very good experience

Our seat row plus one ahead and behind we're completely overlooked during beverage service...

Always have great flight experience on Korean Air. Glad to have been able to book this on Kayak/Under Pricer this year!!

Need to have space for Cary on when traveler boarding any zone

Staff was so nice and very helpful with directions aswell!

Most relaxing long distance flight I have been on. And I have flown on many.

It was our first time flying with China Airlines and had a very nice experience. The airline staff & crews both on the ground and air were very nice. Food on the plane was very good. Will recommend it to family and friends.

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

Very routh cabin crew food is only 2 meals for 13 hours fry with them They should get better training how to service good super routh language and talking with customer

I would like to commend the staff from this flight. They all looked happy and I can tell they love what they are doing and constantly smiling while serving the passengers. Special mention to the guy FA in our section. I did not get his name but he is so far the best F.A I have ever encountered!

When I booked a premium economy ticket. I then had to pay $100+ to book my seat.

I was ordered vegetarian food, but didn't services to me :(

I did not take the flight, tried to cancel it right after I booked it, but was unable to reach anyone. I blame Kayak for this situation because they sent the booking through another company and I was unable to get anyone to talk to me about the situation. I had to just take the hit and pay for another flight through Cathay Pacific, which was wonderful. I will never use Kayak again. (I bet they don’t post this review!) I’ll just post about them on social media sites. I don’t want anyone to have to go through the hassle and expense I dealt with.

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

It was all perfect and very pleasant for such long flights

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Two meals were served on this flight; one was a repeat of the meal I had had on the flight immediately preceding this one, which was bad enough I didn't even try it. Drinks were very limited. All I wanted was water, and on a 10.5 hour flight, I was given 3 cups of about 3 ounces each.

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Drinks were very limited. All I wanted was water, and on a 4 hour flight, I was given 2 cups of about 3 ounces each.

We took business class, It was comfortable and I was able to sleep.

Everything was perfect. A flight attendant even brought me snacks after I declined food due to my desire to force myself to follow the destination time zone.

For the most part, it was an enjoyable experience. It's the 2nd half of the journey was a bit uncomfortable. It was on a noticable smaller plane compared to the previous one.

Only process that my luggage didn’t make it to my destination because of short connection but I understand

The boarding process was good. The toilet could be better maintained.

This has been the worst experience I've ever had. We arrived to Ho Chi Minh Airport and were supposed to get our Asiana ticket from the transfer counter as we came with a different airline. However, the staff at the transfer counter were not helpful and kept giving us different information. We were first told by Asiana airlines staff we had to wait 2 hours so they could print out and give us our tickets, then someone else told us we had to wait 3hrs, someone told us "I don't know, just go sit and wait and we will tell you later." This was at a place in the Ho Chi Minh airport that had no coffee or food shops, nothing, just immigration (to enter Vietnam with a Vietnam Visa) and security (to transfer into the gates) but we needed our printed boarding pass to go through. It wasn't until we demanded to speak to a supervisor as our flight time was 1hr away because they kept telling us "there's alot of time left for your international flight, we will get your tickets later" we still had to wait around 20minutes for the "Supervisor" to give us our tickets. I would NOT recommend Asiana Airlines, especially if going thru Ho Chi Minh Airport as they are not helpful. (We almost missed our flight, due to their lazyness and incompetence of printing our tickets) I would suggest Asiana Airlines to have a Machine in the transfer area so passengers can easily print out their boarding passes themselves and save some money by not hiring incompetent staff that can't do a simple task such as printing a boarding pass.

Both the staff at check-in counter and on board were pleasant and helpful. My chicken and mashed potato was good, sauce was tasty, but the zucchini, carrot n other accompanying vegetables were over-cooked a little. (I understand the meal has to be prepared earlier). Yet I would fly on Singapore Airlines again and recommend it to family and friends.

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.

It was an average flight. I would have expected more from this airline. Food, seats, service, etc was just average. I just give them some extra points for offering free WiFi on board with just a Krisflyer account.

The staff on Singapore Airlines was incredible. I would like to commend LS Reuben from my SQ37 flight on November 19th, 2024, from LAX to Singapore, for his outstanding service and care. During the flight, one of my earbuds—brand new and valued at nearly $300—fell out and became lodged in the box controlling the in-flight entertainment system. I was understandably upset, but Reuben went above and beyond to assist me in this tough situation. Reuben demonstrated exceptional determination and empathy. Instead of suggesting we wait for an engineer, he immediately took action, spending almost 30 minutes searching for the earbud. He even got down on the floor to ensure it was recovered. His genuine concern and persistence made all the difference and turned a frustrating situation into one where I felt truly valued as a passenger. Reuben is a shining example of the remarkable service that sets Singapore Airlines apart. His dedication and willingness to go the extra mile left a lasting impression, and I want to sincerely thank him for his kindness and professionalism.

The food options and quality could use some more excitement and variety.

Really enjoyed the flight. Our flight attendant on the way back SIN-LAX was exceptional I didn’t get her name but she was so kind and went above and beyond to make sure I was comfortable. I had a bit of a panic attack and she checked on me a few times to make sure I was ok. Really appreciated her attention and service. Thank u

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