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$544+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BKK
Jul 9 — Jul 161
Thu 7/9
Thu 7/16
1 adult, Economy
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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 June 9, 2026.

This FlightHub deal was found by Cheapflights users on 6/6. 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 11/179:30 am
DCA
-
BKK
2 stops37h 30m
Multiple Airlines
Thu 2/43:50 pm
BKK
-
DCA
2 stops40h 10m
Multiple Airlines
Deal found 6/6$1,024
This oojo deal was found by Cheapflights users on 6/7. 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.
Tue 10/276:57 pm
DCA
-
HKT
2 stops49h 53m
Singapore Airlines
Tue 11/32:55 pm
HKT
-
DCA
2 stops43h 04m
Singapore Airlines
Deal found 6/7$1,042
This Air Canada deal was found by Cheapflights users on 6/9. 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.
Sun 10/119:40 am
DCA
-
BKK
2 stops56h 25m
Air Canada
Mon 10/197:05 am
BKK
-
DCA
2 stops38h 15m
Air Canada
Deal found 6/9$1,070
This FlightHub deal was found by Cheapflights users on 6/4. 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 10/62:55 pm
DCA
-
BKK
2 stops55h 50m
Gulf Air
Tue 10/277:15 pm
BKK
-
DCA
2 stops38h 42m
Gulf Air
Deal found 6/4$1,072
This KAYAK deal was found by Cheapflights users on 6/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/103:36 pm
DCA
-
BKK
2 stops55h 09m
Gulf Air
Tue 9/158:15 pm
BKK
-
DCA
2 stops37h 47m
Gulf Air
Deal found 6/6$1,073
This Air Canada deal was found by Cheapflights users on 6/8. 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 6/8$1,075
This FlightHub deal was found by Cheapflights users on 6/4. 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 9/912:40 pm
DCA
-
BKK
2 stops29h 25m
Air Canada
Wed 9/237:05 am
BKK
-
DCA
2 stops38h 15m
Air Canada
Deal found 6/4$1,077
This FlightHub deal was found by Cheapflights users on 6/4. 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 9/81:59 pm
DCA
-
BKK
2 stops56h 46m
Gulf Air
Tue 9/298:15 pm
BKK
-
DCA
2 stops37h 47m
Gulf Air
Deal found 6/4$1,078
This Ovago deal was found by Cheapflights users on 6/8. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:35 pm
DCA
-
BKK
2 stops51h 10m
Gulf Air
Tue 9/298:15 pm
BKK
-
DCA
2 stops37h 47m
Gulf Air
Deal found 6/8$1,079
This FlightHub deal was found by Cheapflights users on 6/8. 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 9/2712:40 pm
DCA
-
BKK
2 stops53h 25m
Air Canada
Tue 10/67:45 am
BKK
-
DCA
2 stops25h 05m
Air Canada
Deal found 6/8$1,089
This Air Canada deal was found by Cheapflights users on 6/6. 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 9/169:40 am
DCA
-
BKK
2 stops32h 25m
Air Canada
Thu 9/247:45 am
BKK
-
DCA
2 stops25h 05m
Air Canada
Deal found 6/6$1,092
This Air Canada deal was found by Cheapflights users on 6/7. 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
Tue 10/67:45 am
BKK
-
DCA
2 stops25h 05m
Air Canada
Deal found 6/7$1,097

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 June 9, 2026.

Round-trip from

$1,024
(FlightHub)

One-way from

$544
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,427
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 ($119 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 June 2026
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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 June 9, 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.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Sat 9/5

1:59 pm-9:45 am

2 stops56h 46m

Bangkok Suvarnabhumi

Tue 9/15

8:15 pm-11:02 pm

2 stops37h 47m

$1,178

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Wed 9/16

6:59 pm-10:25 am

2 stops52h 26m

Chiang Mai

Sun 9/27

11:35 am-8:00 pm

2 stops43h 25m

$1,326

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Tue 9/1

6:59 pm-10:25 am

2 stops52h 26m

Chiang Mai

Mon 9/7

11:35 am-8:00 pm

2 stops43h 25m

$1,329

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Sat 8/8

5:00 pm-10:25 am

2 stops30h 25m

Chiang Mai

Thu 9/3

11:35 am-8:00 pm

2 stops43h 25m

$1,384

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Tue 7/7

8:30 am-11:55 pm

2 stops28h 25m

Bangkok Suvarnabhumi

Tue 7/14

9:35 am-9:10 pm

2 stops46h 35m

$1,386

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Sun 9/6

4:20 pm-9:35 am

3 stops30h 15m

Bangkok Suvarnabhumi

Sat 9/19

3:45 pm-9:59 am

3 stops29h 14m

$1,397

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Sun 7/12

8:30 am-11:55 pm

2 stops28h 25m

Bangkok Suvarnabhumi

Tue 7/21

3:45 pm-1:04 pm

3 stops32h 19m

$1,400

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Tue 9/1

6:59 pm-11:00 pm

3 stops41h 01m

Bangkok Suvarnabhumi

Thu 9/10

7:55 am-9:59 pm

2 stops25h 04m

$1,408

Washington, D.C.Chiang Mai

DCA - CNX

DCACNX

Washington, D.C. Reagan-National

Sun 8/23

9:30 am-10:25 am

2 stops37h 55m

Chiang Mai

Sat 8/29

11:35 am-8:00 pm

2 stops43h 25m

$1,444

Washington, D.C.Phuket City

DCA - HKT

DCAHKT

Washington, D.C. Reagan-National

Mon 8/17

5:00 pm-7:15 pm

2 stops39h 15m

Phuket City

Fri 8/21

3:00 pm-8:00 pm

2 stops40h 00m

$1,595

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $1,226). 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 June 9, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Reagan-National Airport to Thailand, such as Korean Air,ANA, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,218 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very good
1,230 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
7.9
Good
8,393 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
9,801 reviews
Korean Air
8.4
Very good
1,218 reviews

Boarding

8.5

Food

8.1

Comfort

8.3

Entertainment

8.2

Overall

8.4

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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?

    Gulf Air, United Airlines, and Cathay Pacific can get you from Washington, D.C. Reagan-National Airport to Thailand in just under 28h 25m. Your travel time can differ by up to 28h 21m. 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 $1,226). 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 4 airlines flying from Reagan-National to Thailand

Discover the top 4 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 June 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$857Average$953FlexibilityNo cancel feeOn-time81%
ANACheapest$893Average$1,087FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$936Average$1,050FlexibilityNo cancel feeOn-time69%
DeltaCheapest$977Average$1,043FlexibilityNo cancel feeOn-timeN/A

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