HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Thailand

$446+ Cheap flights from Reagan-National (DCA) to 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BKK
May 18 — May 251
Mon 5/18
Mon 5/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Reagan-National to Thailand with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Reagan-National to Thailand

Cheapest flights from Reagan-National to Thailand
Explore the most affordable flight options available from Reagan-National to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.

This Air Canada deal was found by Cheapflights users on 4/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:00 am
DCA
-
BKK
2 stops36h 30m
Air Canada
Wed 11/188:15 am
BKK
-
DCA
2 stops38h 06m
Air Canada
Deal found 4/14$989
This Air Canada deal was found by Cheapflights users on 4/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1011:00 am
DCA
-
BKK
2 stops31h 05m
Air Canada
Thu 12/108:15 am
BKK
-
DCA
2 stops24h 45m
Air Canada
Deal found 4/14$994
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Wed 10/712:40 pm
DCA
-
BKK
2 stops29h 25m
Air Canada
Wed 10/217:05 am
BKK
-
DCA
2 stops25h 45m
Air Canada
Deal found 4/14$996
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Wed 10/2112:40 pm
DCA
-
BKK
2 stops29h 25m
Air Canada
Wed 10/288:15 am
BKK
-
DCA
2 stops22h 42m
Air Canada
Deal found 4/14$1,001
This Air Canada deal was found by Cheapflights users on 4/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:00 am
DCA
-
BKK
2 stops31h 05m
Air Canada
Mon 9/287:05 am
BKK
-
DCA
2 stops38h 15m
Air Canada
Deal found 4/14$1,004
This oojo deal was found by Cheapflights users on 4/15. 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 11/99:30 am
DCA
-
BKK
2 stops38h 50m
Singapore Airlines
Sun 11/153:50 pm
BKK
-
DCA
2 stops40h 10m
Singapore Airlines
Deal found 4/15$1,014
This Air Canada deal was found by Cheapflights users on 4/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/39:40 am
DCA
-
BKK
2 stops32h 25m
Air Canada
Wed 10/147:05 am
BKK
-
DCA
2 stops25h 45m
Air Canada
Deal found 4/13$1,026
This Air Canada deal was found by Cheapflights users on 4/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:40 pm
DCA
-
BKK
2 stops45h 25m
Air Canada
Mon 11/168:15 am
BKK
-
DCA
2 stops38h 06m
Air Canada
Deal found 4/13$1,031
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Wed 9/212:40 pm
DCA
-
BKK
2 stops29h 25m
Air Canada
Fri 10/27:05 am
BKK
-
DCA
2 stops25h 45m
Air Canada
Deal found 4/14$1,033
This Justfly.com deal was found by Cheapflights users on 4/14. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:40 pm
DCA
-
BKK
2 stops45h 50m
Air Canada
Fri 10/308:15 am
BKK
-
DCA
2 stops39h 04m
Air Canada
Deal found 4/14$1,038
This Air Canada deal was found by Cheapflights users on 4/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:40 am
DCA
-
BKK
2 stops32h 25m
Air Canada
Wed 9/237:05 am
BKK
-
DCA
2 stops38h 15m
Air Canada
Deal found 4/17$1,040
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Mon 11/236:00 am
DCA
-
BKK
2 stops36h 30m
Air Canada
Fri 11/278:15 am
BKK
-
DCA
2 stops36h 42m
Air Canada
Deal found 4/14$1,041

Find flight deals from Reagan-National to Thailand

Keep the following information in mind while searching for Reagan-National to Thailand flight deals. Data was last updated April 18, 2026.

Round-trip from

$989
(Air Canada)

One-way from

$446
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$934
From Washington, D.C. Reagan-National to Thailand
Search Deals
One-way flight from Washington, D.C. Reagan-National to Thailand
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($116 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to Thailand 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 April 18, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Thailand that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Phuket City

DCA - HKT

DCAHKT

Washington, D.C. Reagan-National

Mon 5/4

3:15 pm-2:05 pm

2 stops35h 50m

Phuket City

Thu 5/14

8:45 pm-10:59 pm

2 stops37h 14m

$1,210

Washington, D.C.Phuket City

DCA - HKT

DCAHKT

Washington, D.C. Reagan-National

Wed 4/22

5:31 pm-2:05 pm

2 stops33h 34m

Phuket City

Mon 4/27

8:40 pm-10:29 pm

2 stops36h 49m

$1,496

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Tue 7/14

6:59 pm-10:25 am

2 stops28h 26m

Chiang Mai

Wed 9/30

11:35 am-8:00 pm

2 stops43h 25m

$1,512
Quickest round-trip

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Thu 4/30

10:05 am-11:35 pm

2 stops26h 30m

Bangkok Suvarnabhumi

Mon 5/25

11:30 pm-2:13 pm

2 stops25h 43m

$1,601

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Sun 5/3

10:05 am-11:55 pm

2 stops26h 50m

Bangkok Suvarnabhumi

Wed 5/27

9:40 pm-5:07 pm

2 stops30h 27m

$1,616

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Tue 5/5

7:40 am-11:35 pm

2 stops28h 55m

Bangkok Suvarnabhumi

Tue 6/2

9:40 pm-5:07 pm

2 stops30h 27m

$1,651

Washington, D.C.Phuket City

DCA - HKT

DCAHKT

Washington, D.C. Reagan-National

Tue 5/19

7:59 am-10:10 pm

2 stops27h 11m

Phuket City

Mon 5/25

11:25 pm-2:59 pm

2 stops26h 34m

$1,701

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Thu 5/28

10:19 am-1:05 am

2 stops27h 46m

Bangkok Suvarnabhumi

Thu 6/4

9:50 am-11:44 pm

2 stops24h 54m

$1,710

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Sat 4/25

9:59 am-10:25 am

2 stops37h 26m

Chiang Mai

Sat 5/2

11:35 am-9:59 pm

2 stops45h 24m

$1,713

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Fri 4/24

9:59 am-10:25 am

2 stops61h 26m

Chiang Mai

Sat 5/2

11:35 am-9:59 pm

2 stops45h 24m

$1,730

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Reagan-National to Thailand

Have a flexible travel schedule? Discover the best time to fly to Thailand from Reagan-National 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. Reagan-National Airport to Thailand

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Thailand?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Thailand (average of $845). Flying from Washington, D.C. Reagan-National Airport to Thailand in May is currently the most expensive (average of $1,139). 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.

Reviews of airlines servicing Thailand

Get insights into the airlines that provide service to Thailand. 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 Thailand. Reviews last updated April 18, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Reagan-National Airport to Thailand, such as ANA,Korean Air, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
1,179 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

8.0

Boarding

8.6

Food

7.8

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
ANA
8.4
Very good
1,179 reviews
ANA
8.4
Very good
1,179 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

8.0

Boarding

8.6

Food

7.8

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
Korean Air
8.4
Very good
1,210 reviews
ANA
8.4
Very good
1,179 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

8.0

Boarding

8.6

Food

7.8

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
Delta
7.9
Good
8,423 reviews
ANA
8.4
Very good
1,179 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

8.0

Boarding

8.6

Food

7.8

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
Cathay Pacific
7.6
Good
1,280 reviews
ANA
8.4
Very good
1,179 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

8.0

Boarding

8.6

Food

7.8

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
United Airlines
7.4
Good
9,604 reviews
ANA
8.4
Very good
1,179 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

8.0

Boarding

8.6

Food

7.8

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Thailand. 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. Reagan-National Airport to Thailand?

    Qatar Airways, Korean Air, and Delta can get you from Washington, D.C. Reagan-National Airport to Thailand in just under 26h 30m. Your travel time can differ by up to 9h 20m. There are 8797 mi between Washington, D.C. Reagan-National Airport and Thailand. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Washington, D.C. Reagan-National Airport to Thailand?

    The most popular route from Washington, D.C. Reagan-National Airport to Thailand is Washington, D.C. Reagan-National - Bangkok Suvarnabhumi. You may also consider Washington, D.C. Reagan-National - Bangkok Don Mueang Intl or Washington, D.C. Reagan-National - Phuket City.

  • Can I find deals for flights from Reagan-National to Thailand that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Thailand flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Thailand?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Thailand.

  • Can I find deals for business class flights from Reagan-National to Thailand?

    Yes. Cheapflights offers flight deals from Reagan-National to Thailand 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. Reagan-National Airport to Thailand?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Thailand (average of $845). Flying from Washington, D.C. Reagan-National Airport to Thailand in May is currently the most expensive (average of $1,139). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Reagan-National to Thailand

Discover the top 5 airlines that operate flights from Reagan-National to Thailand. 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 April 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$857Average$974FlexibilityNo cancel feeOn-time81%
ANACheapest$893Average$1,087FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$936Average$1,050FlexibilityNo cancel feeOn-time69%
DeltaCheapest$977Average$1,085FlexibilityNo cancel feeOn-timeN/A
Cathay PacificCheapest$1,005Average$1,227FlexibilityNo cancel feeOn-time72%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.