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$566+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BKK
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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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 March 28, 2025.

Round-trip from

$1,059
(China Airlines)

One-way from

$566
(China Airlines)

Popular in

July

Cheapest in

September

Average price

$1,258
From Washington, D.C. Reagan-National to Bangkok
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One-way flight from Washington, D.C. Reagan-National to Bangkok
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Highest demand for flights based on searches. 13% potential increase in price ($214 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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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 March 28, 2025.

This China Airlines deal was found by Cheapflights users on 3/27. 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 4/225:38 pmDCA - BKK
2 stops29h 07mMultiple Airlines
Mon 5/55:30 pmBKK - DCA
2 stops35h 02mMultiple Airlines
Deal found 3/27$1,059
This FlightHub deal was found by Cheapflights users on 3/27. 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 10/299:30 amDCA - BKK
2 stops36h 00mSingapore Airlines
Tue 11/113:40 pmBKK - DCA
2 stops41h 15mSingapore Airlines
Deal found 3/27$1,155
This lol.travel deal was found by Cheapflights users on 3/27. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/216:35 amDCA - BKK
2 stops41h 30mCathay Pacific
Wed 5/77:00 pmBKK - DCA
2 stops35h 07mCathay Pacific
Deal found 3/27$1,179
This Air Canada deal was found by Cheapflights users on 3/27. 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 9/19:40 amDCA - BKK
2 stops25h 15mAir Canada
Thu 9/257:35 amBKK - DCA
2 stops24h 31mAir Canada
Deal found 3/27$1,330
This Ovago deal was found by Cheapflights users on 3/27. 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.
Sat 5/38:00 amDCA - BKK
2 stops34h 30mFinnair
Sat 5/177:10 amBKK - DCA
2 stops26h 26mFinnair
Deal found 3/27$1,411
This FlightHub deal was found by Cheapflights users on 3/27. 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 8/318:30 amDCA - BKK
2 stops26h 55mPhilippine Airlines
Mon 9/2911:20 pmBKK - DCA
2 stops32h 54mPhilippine Airlines
Deal found 3/27$1,441
This Mytrip deal was found by Cheapflights users on 3/25. 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.
Sun 6/159:40 amDCA - DMK
2 stops30h 00mMultiple Airlines
Sat 6/2111:55 pmDMK - DCA
2 stops32h 53mMultiple Airlines
Deal found 3/25$2,288

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 March 28, 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

Tue 4/22

5:38 pm-9:45 am

2 stops29h 07m

Bangkok Suvarnabhumi

Mon 5/5

5:30 pm-5:32 pm

2 stops35h 02m

$1,059

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Mon 4/21

6:35 am-11:05 am

2 stops41h 30m

Bangkok Suvarnabhumi

Wed 5/7

7:00 pm-7:07 pm

2 stops35h 07m

$1,179

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Sat 5/3

8:00 am-5:30 am

2 stops34h 30m

Bangkok Suvarnabhumi

Sat 5/17

7:10 am-10:36 pm

2 stops26h 26m

$1,411

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Thu 5/1

8:59 am-8:35 am

3 stops36h 36m

Bangkok Suvarnabhumi

Fri 5/9

3:30 pm-8:58 pm

2 stops40h 28m

$1,453

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Wed 6/4

6:00 am-9:55 pm

2 stops28h 55m

Bangkok Suvarnabhumi

Wed 6/25

7:35 am-9:48 pm

2 stops25h 13m

$1,523

Washington, D.C.Bangkok

DCA - DMK

DCADMK

Washington, D.C. Reagan-National

Tue 4/8

6:00 am-12:10 am

3 stops31h 10m

Bangkok Don Mueang Intl

Thu 4/17

2:45 am-10:28 pm

2 stops30h 43m

$2,371

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Mon 5/12

5:38 pm-4:20 pm

2 stops35h 42m

$566

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Thu 4/17

11:40 am-11:50 pm

2 stops25h 10m

$630

Washington, D.C.Bangkok

DCA - DMK

DCADMK

Washington, D.C. Reagan-National

Fri 4/25

6:35 pm-2:35 pm

3 stops33h 00m

$652

Washington, D.C.Bangkok

DCA - BKK

DCABKK

Washington, D.C. Reagan-National

Sat 4/5

11:00 am-5:15 am

3 stops31h 15m

$680

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 15 results
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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 $963). 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 March 28, 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 March 28, 2025.
Get a feel of what it's like to fly with Japan Airlines, Singapore Airlines and Finnair 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.
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Japan Airlines
8.3
Very good
1,440 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Singapore Airlines
8.1
Very good
1,285 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Finnair
7.6
Good
1,267 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Cathay Pacific
7.5
Good
837 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Qatar Airways
7.4
Good
3,538 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Crew

8.7

Food

7.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Boarding

8.4

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

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 $1,179, 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 Singapore Airlines and Air Canada - these airlines can fly you to your destination from $1,238 and $1,330, respectively. You may be able to fly from Washington, D.C. Reagan-National Airport to Bangkok for 16% 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 $630. Air Canada flights start at $680 while deals on Singapore Airlines start at $907 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 $963). 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

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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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$966Average$1,016FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$1,065Average$1,197FlexibilityNo cancel feeOn-time71%
Cathay PacificCheapest$1,152Average$1,381FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$1,206Average$1,480FlexibilityNo cancel feeOn-time67%
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