In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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

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

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

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

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

Yes. Cheapflights offers flight deals from Thailand to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$611+ Flights from Thailand to Washington, D.C. Reagan-National Airport

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Find flight deals from Thailand to Reagan-National

Cheapest flights from Thailand to Reagan-National
Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2025.

Mon 11/242:15 amBKK - DCA

2 stops30h 27mMultiple Airlines

Wed 1/149:59 amDCA - BKK

2 stops37h 11mMultiple Airlines

Deal found 11/18

$1,028

Tue 11/255:15 pmBKK - DCA

2 stops36h 31mEVA Air

Wed 1/149:59 amDCA - BKK

2 stops37h 11mEVA Air

Deal found 11/18

$1,048

Thu 11/2711:20 amBKK - DCA

2 stops40h 46mMultiple Airlines

Sat 12/69:59 amDCA - BKK

2 stops37h 31mMultiple Airlines

Deal found 11/18

$1,079

Wed 12/37:10 amBKK - DCA

2 stops26h 26mUnited Airlines

Mon 1/58:30 amDCA - BKK

3 stops38h 55mUnited Airlines

Deal found 11/19

$1,098

Mon 12/227:10 amBKK - DCA

2 stops42h 03mUnited Airlines

Tue 1/67:59 pmDCA - BKK

2 stops40h 21mUnited Airlines

Deal found 11/19

$1,102

Thu 11/204:55 pmBKK - DCA

3 stops29h 58mUnited Airlines

Fri 11/282:51 pmDCA - BKK

3 stops32h 34mUnited Airlines

Deal found 11/18

$1,105

Wed 11/1912:55 amBKK - DCA

2 stops30h 04mDelta

Fri 11/286:00 amDCA - BKK

2 stops30h 45mDelta

Deal found 11/18

$1,109

Wed 11/2612:55 amBKK - DCA

2 stops22h 46mDelta

Thu 1/157:35 amDCA - BKK

2 stops29h 20mDelta

Deal found 11/20

$1,110

Thu 11/274:55 pmBKK - DCA

3 stops32h 04mUnited Airlines

Sat 12/66:00 amDCA - BKK

2 stops35h 10mUnited Airlines

Deal found 11/18

$1,116

Sat 11/2212:45 pmBKK - DCA

2 stops39h 21mEVA Air

Mon 11/249:59 amDCA - BKK

2 stops37h 11mEVA Air

Deal found 11/17

$1,129

Wed 11/267:10 amBKK - DCA

2 stops25h 35mUnited Airlines

Wed 1/1412:00 pmDCA - BKK

3 stops35h 25mUnited Airlines

Deal found 11/20

$1,159

Tue 12/2311:50 amCNX - DCA

2 stops44h 49mMultiple Airlines

Tue 1/69:59 amDCA - CNX

2 stops60h 36mMultiple Airlines

Deal found 11/18

$1,338

Best flights from Thailand to Reagan-National
Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 20, 2025.

Wed 2/188:00 amBKK - DCA

2 stops23h 59mAir Canada

Mon 2/239:40 amDCA - BKK

2 stops24h 50mAir Canada

Deal found 11/19

$1,036

Thu 4/23:40 pmBKK - DCA

3 stops32h 30mUnited Airlines

Tue 4/1411:30 amDCA - BKK

3 stops35h 15mUnited Airlines

Deal found 11/18

$1,044

Thu 4/29:50 amBKK - DCA

2 stops24h 43mDelta

Tue 4/146:00 amDCA - BKK

2 stops30h 40mDelta

Deal found 11/18

$1,109

Tue 12/2311:50 amCNX - DCA

2 stops44h 49mMultiple Airlines

Tue 1/69:59 amDCA - CNX

2 stops60h 36mMultiple Airlines

Deal found 11/18

$1,338

Mon 12/224:55 pmBKK - DCA

3 stops30h 02mUnited Airlines

Tue 1/67:59 pmDCA - BKK

2 stops40h 21mUnited Airlines

Deal found 11/19

$1,048

Tue 3/1012:55 amBKK - DCA

2 stops29h 25mDelta

Sun 3/156:30 amDCA - BKK

2 stops31h 15mDelta

Deal found 11/18

$1,110

Sat 2/288:15 amBKK - DCA

2 stops23h 44mAir Canada

Sat 5/1611:00 amDCA - BKK

2 stops25h 10mAir Canada

Deal found 11/20

$1,141

Wed 12/37:10 amBKK - DCA

3 stops40h 22mUnited Airlines

Mon 1/52:00 pmDCA - BKK

3 stops33h 25mUnited Airlines

Deal found 11/19

$1,098

Tue 12/234:55 pmBKK - DCA

3 stops31h 03mUnited Airlines

Tue 1/66:00 amDCA - BKK

2 stops30h 20mUnited Airlines

Deal found 11/18

$1,109

Tue 2/1712:15 amCNX - DCA

2 stops33h 21mDelta

Sun 2/227:00 amDCA - CNX

2 stops27h 55mDelta

Deal found 11/17

$2,927

Last-minute flights from Thailand to Reagan-National
Discover last-minute flight deals from Thailand to Reagan-National. Data last updated November 20, 2025 and is based on user searches.

Thu 11/204:55 pmBKK - DCA

3 stops29h 58mUnited Airlines

Fri 11/282:51 pmDCA - BKK

3 stops32h 34mUnited Airlines

Deal found 11/18

$1,105

Thu 11/2011:15 pmBKK - DCA

2 stops30h 04mDelta

Fri 11/287:40 amDCA - BKK

2 stops29h 05mDelta

Deal found 11/18

$1,109

Sat 11/2212:45 pmBKK - DCA

2 stops39h 21mEVA Air

Mon 11/249:59 amDCA - BKK

2 stops37h 11mEVA Air

Deal found 11/17

$1,129

Mon 11/242:15 amBKK - DCA

2 stops30h 27mMultiple Airlines

Wed 1/149:59 amDCA - BKK

2 stops37h 11mMultiple Airlines

Deal found 11/18

$1,028

Tue 11/255:15 pmBKK - DCA

2 stops36h 31mEVA Air

Wed 1/149:59 amDCA - BKK

2 stops37h 11mEVA Air

Deal found 11/18

$1,048

Wed 11/2612:55 amBKK - DCA

2 stops22h 46mDelta

Thu 1/157:35 amDCA - BKK

2 stops29h 20mDelta

Deal found 11/20

$1,110

Wed 11/267:10 amBKK - DCA

2 stops25h 35mUnited Airlines

Wed 1/1412:00 pmDCA - BKK

3 stops35h 25mUnited Airlines

Deal found 11/20

$1,159

Thu 11/2711:20 amBKK - DCA

2 stops40h 46mMultiple Airlines

Sat 12/69:59 amDCA - BKK

2 stops37h 31mMultiple Airlines

Deal found 11/18

$1,079

Thu 11/274:55 pmBKK - DCA

3 stops32h 04mUnited Airlines

Sat 12/66:00 amDCA - BKK

2 stops35h 10mUnited Airlines

Deal found 11/18

$1,116

Wed 12/37:10 amBKK - DCA

2 stops26h 26mUnited Airlines

Mon 1/58:30 amDCA - BKK

3 stops38h 55mUnited Airlines

Deal found 11/19

$1,098

Mon 12/227:10 amBKK - DCA

2 stops42h 03mUnited Airlines

Tue 1/67:59 pmDCA - BKK

2 stops40h 21mUnited Airlines

Deal found 11/19

$1,102

Tue 12/2311:50 amCNX - DCA

2 stops44h 49mMultiple Airlines

Tue 1/69:59 amDCA - CNX

2 stops60h 36mMultiple Airlines

Deal found 11/18

$1,338

One-way flights from Thailand to Reagan-National
Search for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated November 20, 2025.

Mon 4/271:15 amBKK - DCA

2 stops53h 46mMultiple Airlines

Deal found 11/20

$611

Wed 11/268:15 amBKK - DCA

2 stops26h 20mAir Canada

Deal found 11/19

$617

Sun 4/261:20 amBKK - DCA

2 stops42h 39mAir Canada

Deal found 11/20

$624

Fri 1/232:05 pmBKK - DCA

2 stops39h 51mMultiple Airlines

Deal found 11/18

$632

Tue 1/1310:40 amBKK - DCA

3 stops47h 19mMultiple Airlines

Deal found 11/19

$639

Sat 1/248:15 amBKK - DCA

2 stops38h 08mAir Canada

Deal found 11/19

$641

Sun 4/263:00 amBKK - DCA

3 stops30h 49mMultiple Airlines

Deal found 11/20

$642

Sat 2/288:15 amBKK - DCA

2 stops23h 44mAir Canada

Deal found 11/20

$647

Fri 4/247:05 amBKK - DCA

2 stops36h 54mAir Canada

Deal found 11/17

$648

Wed 11/2612:15 amCNX - DCA

2 stops47h 24mDelta

Deal found 11/18

$670

Thu 1/2912:15 amCNX - DCA

2 stops29h 38mDelta

Deal found 11/19

$724

Fri 1/3011:25 amCNX - DCA

2 stops42h 31mChina Airlines

Deal found 11/17

$726

Cheap flight deals from Thailand to Reagan-National

Round-trip from	$1,036 (Justfly.com)
One-way from	$611 (Kiwi.com)
Popular in	August
Cheapest in	October
Average price	$1,115

From Thailand to Washington, D.C. Reagan-National

Search Deals

One-way flight from Thailand to Washington, D.C. Reagan-National

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($65 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in November 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Thailand to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

Wed 2/18

8:00 am-7:59 pm

2 stops23h 59m

Washington, D.C. Reagan-National

Mon 2/23

9:40 am-10:30 pm

2 stops24h 50m

$1,036

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

Thu 4/2

3:40 pm-1:10 pm

3 stops32h 30m

Washington, D.C. Reagan-National

Tue 4/14

11:30 am-9:45 am

3 stops35h 15m

$1,044

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

Mon 12/22

4:55 pm-10:57 am

3 stops30h 02m

Washington, D.C. Reagan-National

Tue 1/6

7:59 pm-12:20 am

2 stops40h 21m

$1,048

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

Wed 12/3

7:10 am-11:32 am

3 stops40h 22m

Washington, D.C. Reagan-National

Mon 1/5

2:00 pm-11:25 am

3 stops33h 25m

$1,098

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

Thu 4/2

9:50 am-11:33 pm

2 stops24h 43m

Washington, D.C. Reagan-National

Tue 4/14

6:00 am-11:40 pm

2 stops30h 40m

$1,109

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

Tue 12/23

4:55 pm-11:58 am

3 stops31h 03m

Washington, D.C. Reagan-National

Tue 1/6

6:00 am-12:20 am

2 stops30h 20m

$1,109

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

Tue 3/10

12:55 am-7:20 pm

2 stops29h 25m

Washington, D.C. Reagan-National

Sun 3/15

6:30 am-12:45 am

2 stops31h 15m

$1,110

BangkokWashington, D.C.

BKK - DCA

BKKDCA

Bangkok Suvarnabhumi

Sat 2/28

8:15 am-7:59 pm

2 stops23h 44m

Washington, D.C. Reagan-National

Sat 5/16

11:00 am-11:10 pm

2 stops25h 10m

$1,141

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Tue 12/23

11:50 am-8:39 pm

2 stops44h 49m

Washington, D.C. Reagan-National

Tue 1/6

9:59 am-10:35 am

2 stops60h 36m

$1,338

Chiang MaiWashington, D.C.

CNX - DCA

CNXDCA

Chiang Mai

Tue 2/17

12:15 am-9:36 pm

2 stops33h 21m

Washington, D.C. Reagan-National

Sun 2/22

7:00 am-10:55 pm

2 stops27h 55m

$2,927

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 26 results

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

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

What is the cheapest time of day to fly from TH to DCA?

It’s optimal to fly from Thailand to Washington, D.C. Reagan-National Airport in the afternoon. By choosing this option you can save up to 67% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from Thailand to Washington, D.C. Reagan-National Airport?

Travelers seeking maximum savings on their Thailand to Washington, D.C. Reagan-National Airport flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Reagan-National

Read through reviews of airlines operating flights from Thailand to Washington, D.C. Reagan-National Airport, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

9,029 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

United Airlines

7.4

Good

9,029 reviews

United Airlines

7.4

Good

9,029 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

How long is the flight from Thailand to Washington, D.C. Reagan-National Airport?
Air Canada and United Airlines can get you from Thailand to Washington, D.C. Reagan-National Airport in just under 23h 59m. Your travel time can differ by up to 8h 31m. Thailand and Washington, D.C. Reagan-National Airport are separated by a distance of 8797 mi. This flight may include one or multiple stops.
Can I find deals for flights from Thailand to Reagan-National that include hotel bookings?
Yes. In addition to deals on Thailand to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Thailand to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Thailand to Reagan-National.
Can I find deals for business class flights from Thailand to Reagan-National?
Yes. Cheapflights offers flight deals from Thailand to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Alexandria

Tysons

Woodbridge

Arlington

Owings Mills

Springfield

Hanover

Silver Spring

Fairfax

Fredericksburg

Falls Church

Linthicum Heights

Manassas

Laurel

Towson

National Harbor

Waldorf

Bowie

Largo

McLean

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Thailand to Reagan-National

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$1,038	Average$1,054	FlexibilityNo cancel fee	On-time69%

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$611+ Cheap flights from Thailand to Reagan-National (DCA)

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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Thailand to Reagan-National with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Thailand to Reagan-National

Cheapest flights from Thailand to Reagan-NationalExplore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2025.

Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2025.

Cheap flight deals from Thailand to Reagan-National

Keep the following information in mind while searching for Thailand to Reagan-National flight deals. Data was last updated November 20, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Thailand to Washington, D.C. Reagan-National Airport that are best for you.

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

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Thailand with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Thailand to Washington, D.C. Reagan-National Airport

What is the cheapest time of day to fly from TH to DCA?

Find hourly flight availability from Thailand to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2025.

What is the cheapest day to fly from Thailand to Washington, D.C. Reagan-National Airport?

Use this chart to determine the cheapest time to fly round-trip from Thailand to Reagan-National. Price data was last updated on December 16, 2024.

Reviews of airlines servicing Reagan-National

Read through reviews of airlines operating flights from Thailand to Washington, D.C. Reagan-National Airport, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

Traveling to a place near Washington, D.C. Reagan-National Airport?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Thailand to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Thailand to Reagan-National

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Cheapest flights from Thailand to Reagan-National
Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2025.