In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 66.0 mm.

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Thailand to Washington, D.C. Reagan-National Airport as you normally would.

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 holiday 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.

฿17,647+ Cheap Flights from Thailand to Washington, D.C. Reagan-National Airport

Cheap flight deals from Thailand to Reagan-National

Enter your travel dates to find the best prices.

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Best

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One-way

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 7 October 2026.

Tue 3/1107:10 -

2 stops27h 20m

Tue 10/1113:05 -

3 stops34h 25m

Deal found 6/10฿35,160

Tue 20/1009:35 -

2 stops45h 33m

Sat 31/1016:09 -

3 stops32h 21m

Deal found 4/10฿35,193

Sun 18/1015:45 -

3 stops31h 23m

Sat 31/1016:09 -

3 stops32h 21m

Deal found 2/10฿35,361

Thu 12/1109:10 -

2 stops25h 20m

Mon 16/1108:30 -

2 stops26h 20m

Deal found 2/10฿36,269

Mon 12/1015:45 -

3 stops28h 09m

Sun 18/1012:57 -

2 stops47h 58m

Deal found 5/10฿36,571

Wed 4/1107:10 -

2 stops25h 07m

Wed 11/1114:25 -

3 stops33h 05m

Deal found 7/10฿36,605

Wed 7/1001:35 -

2 stops29h 25m

Thu 15/1009:30 -

2 stops37h 55m

Deal found 3/10฿38,319

Find flight deals from Thailand to Reagan-National

Round-trip from	฿35,160
One-way from	฿17,647
Popular in	April
Cheapest in	January
Average price	฿28,840

United Airlines
3/11-10/11
5 total stops
61h 45m total
Thailand to Washington, D.C.

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เอทิฮัดแอร์เวย์
8/11-31/12
2 total stops
35h 06m total
Thailand to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (฿315,871 potential increase over avg. return price).

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Cheapest flight prices on average. 5% potential price decrease (฿69,540 potential savings vs. average return price).

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Average for round-trip flights in October 2026

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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

Cheapest return flight

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Thu 5/11

14:40-18:00

2 stops39h 20m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿18,151

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Sun 1/11

08:30-20:06

2 stops46h 36m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿18,151

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Fri 4/12

15:05-20:00

2 stops40h 55m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿21,647

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Thu 29/10

19:15-19:05

2 stops34h 50m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿22,185

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Thu 17/12

14:50-07:00

2 stops28h 10m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿24,773

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Tue 27/10

15:10-16:37

3 stops36h 27m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿25,950

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Wed 25/11

15:10-14:27

3 stops35h 17m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿27,832

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Thu 4/2

09:50-08:22

2 stops34h 32m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿29,613

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Mon 14/12

16:55-10:19

3 stops29h 24m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿29,983

Fastest return journey

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Sun 13/12

16:55-08:09

3 stops27h 14m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿29,983

Flights are sorted by cheapest return flights first.

Deals found on 3/10

Showing 1-10 of 21 resultsSorted by cheapest first

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.

BKK-DCA

Estimated return 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

TH0-DCA

BKK-DCA

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Thailand to Washington, D.C. Reagan-National Airport?
United Airlines can get you from Thailand to Washington, D.C. Reagan-National Airport in just under 28h 09m. Your travel time can differ by up to . The distance between Thailand and Washington, D.C. Reagan-National Airport is about 14157 km.
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 holiday 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

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Cheap flights from Thailand to Washington, D.C. Reagan-National Airport from ฿17,647

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 7 October 2026.

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 7 October 2026.

Best flights from Thailand to Reagan-NationalDiscover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 October 2026.

Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 October 2026.

Last-minute flights from Thailand to Reagan-NationalDiscover last-minute flight deals from Thailand to Reagan-National. Data last updated 7 October 2026 and is based on user searches.

Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 7 October 2026 and is based on user searches.

One-way flights from Thailand to Reagan-NationalSearch for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 7 October 2026.

Search for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 7 October 2026.

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

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Cheapflights Insights

Related info for your journey

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?

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.

Alternative routes for Thailand to Reagan-National

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

Complete your trip

Complete your trip to Reagan-National by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Thailand to Reagan-National by cabin class

Find flights from Thailand to Reagan-National, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Thailand and Reagan-National flights

Browse other Thailand and Reagan-National flight options. Last updated on 7 October 2026.

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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 7 October 2026.

Best flights from Thailand to Reagan-National
Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 October 2026.

Last-minute flights from Thailand to Reagan-National
Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 7 October 2026 and is based on user searches.

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 7 October 2026.