HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bangkok

$547+ Cheap flights from Reagan-National (DCA) to Bangkok

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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BKK
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Reagan-National to Bangkok 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 Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Bangkok (TH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 17, 2025.

Round-trip from

$1,007
(StudentUniverse)

One-way from

$547
(Cathay Pacific)

Popular in

April

Cheapest in

September

Average price

$1,899
From Washington, D.C. Reagan-National to Bangkok
Search Deals
One-way flight from Washington, D.C. Reagan-National to Bangkok
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Reagan-National to Bangkok

Cheapest flights from Reagan-National to Bangkok
Explore the most affordable flight options available from Reagan-National to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This China Airlines deal was found by Cheapflights users on 4/16. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:30 pmDCA - BKK
2 stops28h 20mMultiple Airlines
Tue 2/102:05 pmBKK - DCA
2 stops38h 10mMultiple Airlines
Deal found 4/16$978
This StudentUniverse 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2112:16 pmDCA - BKK
2 stops24h 34mCathay Pacific
Tue 8/2611:00 amBKK - DCA
2 stops24h 50mCathay Pacific
Deal found 4/17$996
This oojo deal was found by Cheapflights users on 4/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:30 pmDCA - BKK
2 stops29h 20mChina Airlines
Mon 11/1710:55 amBKK - DCA
2 stops46h 00mChina Airlines
Deal found 4/16$1,060
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:30 pmDCA - BKK
2 stops29h 40mEVA Air
Mon 11/172:15 amBKK - DCA
2 stops27h 17mEVA Air
Deal found 4/17$1,154
This FlightHub deal was found by Cheapflights users on 4/16. 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 8/269:00 amDCA - BKK
3 stops39h 00mSingapore Airlines
Tue 9/23:30 pmBKK - DCA
2 stops40h 29mSingapore Airlines
Deal found 4/16$1,163
This Booking.com deal was found by Cheapflights users on 4/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:59 amDCA - BKK
2 stops34h 36mAir Canada
Mon 10/69:35 pmBKK - DCA
2 stops35h 59mAir Canada
Deal found 4/16$1,199
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.
Tue 4/295:00 pmDCA - BKK
2 stops26h 15mQatar Airways
Sun 6/298:40 amBKK - DCA
2 stops34h 10mQatar Airways
Deal found 4/15$1,281
This Mytrip deal was found by Cheapflights users on 4/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/226:35 amDCA - DMK
3 stops29h 40mMultiple Airlines
Wed 4/307:25 pmDMK - DCA
3 stops31h 31mMultiple Airlines
Deal found 4/16$1,829

Cheapflights Fare Finder

Customize your flight search to find flights from Reagan-National to Bangkok 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 17, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Bangkok that are best for you.

Fly from

Reagan-National

Fly to

Bangkok

Route

Depart

Return

Price

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Thu 8/21

12:16 pm-11:50 pm

2 stops24h 34m

Bangkok Suvarnabhumi

Tue 8/26

11:00 am-12:50 am

2 stops24h 50m

$996

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Wed 9/17

9:00 am-12:10 pm

2 stops40h 10m

Bangkok Suvarnabhumi

Wed 9/24

5:30 pm-8:59 pm

2 stops38h 29m

$1,020

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Mon 9/1

5:06 pm-11:10 am

2 stops31h 04m

Bangkok Suvarnabhumi

Mon 9/8

1:35 am-5:59 pm

2 stops27h 24m

$1,154

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Tue 8/26

9:00 am-11:00 am

3 stops39h 00m

Bangkok Suvarnabhumi

Tue 9/2

3:30 pm-8:59 pm

2 stops40h 29m

$1,163

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Thu 9/25

6:59 am-4:35 am

2 stops34h 36m

Bangkok Suvarnabhumi

Mon 10/6

9:35 pm-10:34 pm

2 stops35h 59m

$1,199

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Tue 4/29

5:00 pm-6:15 am

2 stops26h 15m

Bangkok Suvarnabhumi

Sun 6/29

8:40 am-7:50 am

2 stops34h 10m

$1,281

Washington, D.C.Bangkok

DCA - DMK

DCADMK

Washington, D.C. Reagan-National

Tue 4/22

6:35 am-11:15 pm

3 stops29h 40m

Bangkok Don Mueang Intl

Wed 4/30

7:25 pm-3:56 pm

3 stops31h 31m

$1,829

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Tue 4/22

11:54 am-11:50 pm

2 stops24h 56m

$547

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Wed 9/17

9:00 am-9:45 am

2 stops37h 45m

$548

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Fri 5/9

8:59 am-1:25 am

2 stops29h 26m

$623

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 19 results
1
2

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

Have a flexible travel schedule? Discover the best time to fly to Bangkok 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 Bangkok

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Bangkok (average of $958). Flying from Washington, D.C. Reagan-National Airport to Bangkok in December is currently the most expensive (average of $1,574). 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 DCA to BKK?

Find hourly flight availability from Reagan-National to Bangkok. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

One of the essential ways to save on airfare from Washington, D.C. Reagan-National Airport to Bangkok is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 29% on airfare.

Rainfall in Bangkok by month

Plan your trip to Bangkok by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bangkok ranges from 0.4 - 12.6 inches per month. September is typically the wettest month, when rainfall can reach 12.6 in. January is typically the driest time to visit Bangkok when rainfall is around 0.4 in.

Temperature in Bangkok by month

Plan your trip to Bangkok by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bangkok, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. 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 Bangkok. Reviews last updated April 17, 2025.
Get a feel of what it's like to fly with EVA Air, Korean Air and Japan Airlines from Washington, D.C. to Bangkok by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,177 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very good
1,177 reviews
EVA Air
8.4
Very good
1,177 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Korean Air
8.4
Very good
1,064 reviews
EVA Air
8.4
Very good
1,177 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Japan Airlines
8.3
Very good
1,440 reviews
EVA Air
8.4
Very good
1,177 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
ANA
8.3
Very good
844 reviews
EVA Air
8.4
Very good
1,177 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
China Airlines
8.2
Very good
729 reviews
EVA Air
8.4
Very good
1,177 reviews

Comfort

8.3

Overall

8.4

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Bangkok. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to Bangkok round-trip?

    Currently priced at $1,007, Cathay Pacific will fly you from Washington, D.C. Reagan-National Airport to Bangkok and back. In addition to Cathay Pacific, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from EVA Air and China Airlines - these airlines can fly you to your destination from $1,159 and $1,268, respectively. You may be able to fly from Washington, D.C. Reagan-National Airport to Bangkok for 30% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Bangkok one-way?

    To fly one-way, consider booking your trip with Cathay Pacific, which is currently one of the cheapest options available, starting at $547. EVA Air flights start at $713 while deals on China Airlines start at $746 one-way.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Bangkok (average of $958). Flying from Washington, D.C. Reagan-National Airport to Bangkok in December is currently the most expensive (average of $1,574). 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 Bangkok

Discover the top 4 airlines that operate flights from Reagan-National to Bangkok. 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 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$966Average$1,016FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$1,065Average$1,197FlexibilityNo cancel feeOn-time71%
Cathay PacificCheapest$1,120Average$1,357FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$1,206Average$1,480FlexibilityNo cancel feeOn-time67%

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.