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Ko Phi Phi

$491+ Cheap flights from Dulles Intl (IAD) to Ko Phi Phi, Thailand

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — HKT
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Dulles Intl to Ko Phi Phi

Keep the following information in mind while searching for Dulles Intl to Ko Phi Phi flight deals. Data was last updated September 17, 2025.

Round-trip from

$860
(Booking.com)

One-way from

$491
(Booking.com)

Popular in

June

Cheapest in

October

Average price

$1,218
From Washington, D.C. Dulles Intl to Ko Phi Phi
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One-way flight from Washington, D.C. Dulles Intl to Ko Phi Phi
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Highest demand for flights based on searches. 9% potential increase in price ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Dulles Intl to Ko Phi Phi

Cheapest flights from Dulles Intl to Ko Phi Phi
Explore the most affordable flight options available from Dulles Intl to Ko Phi Phi. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Booking.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/69:40 pmIAD - HKT
2 stops36h 55mIndiGo
Mon 10/1310:50 pmHKT - IAD
2 stops47h 55mIndiGo
Deal found 9/15$863
This oojo deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3111:00 pmIAD - HKT
1 stop30h 30mAir China
Thu 11/66:25 pmHKT - IAD
1 stop36h 05mAir China
Deal found 9/15$924
This FlightHub deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:05 pmIAD - HKT
1 stop22h 45mQatar Airways
Tue 11/185:20 pmHKT - IAD
2 stops27h 00mQatar Airways
Deal found 9/15$932
This FlightHub deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/118:05 pmIAD - HKT
2 stops38h 55mQatar Airways
Tue 11/188:25 amHKT - IAD
1 stop35h 55mQatar Airways
Deal found 9/15$935
This Booking.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/131:30 pmIAD - HKT
2 stops45h 05mIndiGo
Mon 10/2010:50 pmHKT - IAD
2 stops47h 55mIndiGo
Deal found 9/14$944
This FlightHub deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/29:00 pmIAD - HKT
1 stop34h 50mQatar Airways
Mon 10/65:30 pmHKT - IAD
2 stops33h 10mQatar Airways
Deal found 9/14$951
This FlightHub deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/149:00 pmIAD - HKT
2 stops34h 30mQatar Airways
Tue 10/288:30 pmHKT - IAD
1 stop23h 50mQatar Airways
Deal found 9/16$955
This FlightHub deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/179:00 pmIAD - HKT
1 stop23h 50mQatar Airways
Mon 9/222:45 pmHKT - IAD
2 stops35h 55mQatar Airways
Deal found 9/15$958
This Gotogate deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:00 pmIAD - HKT
1 stop23h 50mQatar Airways
Mon 10/69:55 pmHKT - IAD
2 stops28h 45mQatar Airways
Deal found 9/16$963
This oojo deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:00 pmIAD - HKT
1 stop23h 50mQatar Airways
Thu 10/29:55 pmHKT - IAD
2 stops28h 45mQatar Airways
Deal found 9/15$968
This FlightHub deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1011:00 amIAD - HKT
1 stop20h 50mQatar Airways
Wed 10/222:45 pmHKT - IAD
2 stops35h 55mQatar Airways
Deal found 9/15$969

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Ko Phi Phi 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, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ko Phi Phi that are best for you.

Fly from

Dulles Intl

Fly to

Ko Phi Phi

Route

Depart

Return

Price

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Sun 11/9

8:05 pm-5:50 am

1 stop21h 45m

Phuket City

Tue 11/18

3:00 pm-8:20 am

2 stops29h 20m

$932

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Mon 9/29

9:00 pm-7:50 am

1 stop23h 50m

Phuket City

Mon 10/6

9:55 pm-3:40 pm

2 stops28h 45m

$963

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Wed 11/5

6:10 pm-10:30 pm

1 stop40h 20m

Phuket City

Mon 11/10

11:55 pm-2:45 pm

1 stop26h 50m

$1,001

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Wed 11/19

11:50 am-10:10 pm

1 stop46h 20m

Phuket City

Tue 12/16

11:40 pm-9:50 am

1 stop22h 10m

$1,018

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Mon 10/6

6:05 am-10:10 pm

2 stops29h 05m

Phuket City

Mon 10/13

11:25 pm-11:33 pm

2 stops35h 08m

$1,054

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Wed 11/19

12:11 pm-10:45 pm

2 stops46h 34m

Phuket City

Mon 12/15

12:20 am-7:19 pm

2 stops30h 59m

$1,067

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Wed 11/5

6:18 am-10:10 pm

2 stops27h 52m

Phuket City

Mon 11/10

11:40 pm-11:19 pm

2 stops35h 39m

$1,079

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Wed 11/19

7:15 am-10:10 pm

2 stops26h 55m

Phuket City

Tue 12/16

11:40 pm-7:25 pm

2 stops31h 45m

$1,079

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Wed 12/3

9:10 pm-9:20 pm

2 stops36h 10m

$491

Washington, D.C.Phuket City

IAD - HKT

IADHKT

Washington, D.C. Dulles Intl

Tue 11/25

9:10 pm-9:20 pm

2 stops36h 10m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 18 results
1
2

Best time to book a flight from Dulles Intl to Ko Phi Phi

Have a flexible travel schedule? Discover the best time to fly to Ko Phi Phi from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Ko Phi Phi

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Ko Phi Phi?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Ko Phi Phi. Price data was last updated on September 12, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Ko Phi Phi is 10 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Ko Phi Phi?

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ko Phi Phi (average of $1,063). Flying from Washington, D.C. Dulles Intl Airport to Ko Phi Phi in December is currently the most expensive (average of $1,678). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAD to K33?

Find hourly flight availability from Dulles Intl to Ko Phi Phi. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Ko Phi Phi, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Ko Phi Phi?

Reviews of airlines servicing Ko Phi Phi

Get insights into the airlines that provide service to Ko Phi Phi. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Phi Phi. Reviews last updated September 17, 2025.
See what other customers who have flown with Emirates, Qatar Airways, and Etihad Airways from Washington, D.C. Dulles Intl Airport to Ko Phi Phi have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.1
Very good
3,339 reviews

Comfort

8.0

Entertainment

8.2

Food

7.9

Boarding

8.1

Crew

8.3

Overall

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Emirates
8.1
Very good
3,339 reviews
Emirates
8.1
Very good
3,339 reviews

Comfort

8.0

Entertainment

8.2

Food

7.9

Boarding

8.1

Crew

8.3

Overall

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Qatar Airways
7.4
Good
3,622 reviews
Emirates
8.1
Very good
3,339 reviews

Comfort

8.0

Entertainment

8.2

Food

7.9

Boarding

8.1

Crew

8.3

Overall

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Etihad Airways
7.4
Good
1,251 reviews
Emirates
8.1
Very good
3,339 reviews

Comfort

8.0

Entertainment

8.2

Food

7.9

Boarding

8.1

Crew

8.3

Overall

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Turkish Airlines
7.3
Good
3,965 reviews
Emirates
8.1
Very good
3,339 reviews

Comfort

8.0

Entertainment

8.2

Food

7.9

Boarding

8.1

Crew

8.3

Overall

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Air India
5.5
Fair
2,932 reviews
Emirates
8.1
Very good
3,339 reviews

Comfort

8.0

Entertainment

8.2

Food

7.9

Boarding

8.1

Crew

8.3

Overall

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Ko Phi Phi. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Ko Phi Phi?

    There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Ko Phi Phi in 21h 45m. Fly via Qatar Airways, SAUDIA, or Korean Air to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and Ko Phi Phi is about 9167 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Dulles Intl to Ko Phi Phi that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Ko Phi Phi flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Ko Phi Phi?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Ko Phi Phi.

  • Can I find deals for business class flights from Dulles Intl to Ko Phi Phi?

    Yes. Cheapflights offers flight deals from Dulles Intl to Ko Phi Phi by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Ko Phi Phi?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Ko Phi Phi (average of $1,063). Flying from Washington, D.C. Dulles Intl Airport to Ko Phi Phi in December is currently the most expensive (average of $1,678). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Dulles Intl to Ko Phi Phi

Discover the top 5 airlines that operate flights from Dulles Intl to Ko Phi Phi. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$928Average$1,145FlexibilityNo cancel feeOn-time77%
Air IndiaCheapest$955Average$1,081FlexibilityNo cancel feeOn-timeN/A
Etihad AirwaysCheapest$1,002Average$1,142FlexibilityNo cancel feeOn-time75%
Qatar AirwaysCheapest$1,053Average$1,368FlexibilityNo cancel feeOn-time68%
EmiratesCheapest$1,136Average$1,297FlexibilityNo cancel feeOn-time75%

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