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Cheap Flights from Houston (HOUA) to Washington D.C. (IAD)

Compare Houston to Washington Dulles flight deals

Find the cheapest month or even day of the year to fly to Washington Dulles

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Flight deals from Houston to Washington Dulles

Looking for a cheap last-minute deal or the best return flight from Houston to Washington Dulles? Find the lowest prices on one-way and return tickets right here.
Washington D.C..$274 per passenger.Departing Wed, 2 Jul, returning Fri, 4 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Houston George Bush Intercntl. on Wed, 2 Jul, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Fri, 4 Jul, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $274, select.
Washington D.C..$275 per passenger.Departing Fri, 27 Jun, returning Sun, 29 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Houston George Bush Intercntl. on Fri, 27 Jun, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sun, 29 Jun, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $275, select.
Washington D.C..$289 per passenger.Departing Mon, 30 Jun, returning Wed, 2 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Houston George Bush Intercntl. on Mon, 30 Jun, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 2 Jul, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $289, select.
Washington D.C..$381 per passenger.Departing Tue, 12 Aug, returning Sat, 16 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Houston Hobby on Tue, 12 Aug, arriving in Washington Dulles.Inbound indirect flight with Delta, departs from Washington Dulles on Sat, 16 Aug, arriving in Houston Hobby.Price includes taxes and charges.From $381, select.
Washington D.C..$381 per passenger.Departing Sat, 8 Nov, returning Sat, 15 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Houston Hobby on Sat, 8 Nov, arriving in Washington Dulles.Inbound indirect flight with Delta, departs from Washington Dulles on Sat, 15 Nov, arriving in Houston Hobby.Price includes taxes and charges.From $381, select.
Washington D.C..$383 per passenger.Departing Sat, 27 Sep, returning Sat, 4 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Houston Hobby on Sat, 27 Sep, arriving in Washington Dulles.Inbound indirect flight with Delta, departs from Washington Dulles on Sat, 4 Oct, arriving in Houston Hobby.Price includes taxes and charges.From $383, select.
Washington D.C..$383 per passenger.Departing Sat, 11 Oct, returning Sat, 18 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Houston Hobby on Sat, 11 Oct, arriving in Washington Dulles.Inbound indirect flight with Delta, departs from Washington Dulles on Sat, 18 Oct, arriving in Houston Hobby.Price includes taxes and charges.From $383, select.
Washington D.C..$397 per passenger.Departing Thu, 31 Jul, returning Thu, 7 Aug.Return flight with Spirit Airlines and Allegiant Air.Outbound indirect flight with Spirit Airlines, departs from Houston George Bush Intercntl. on Thu, 31 Jul, arriving in Washington Dulles.Inbound indirect flight with Allegiant Air, departs from Washington Dulles on Thu, 7 Aug, arriving in Houston George Bush Intercntl..Price includes taxes and charges.From $397, select.

Find the cheapest month to fly from Houston to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Houston to Washington Dulles flights are currently cheapest in July.
Jun
from $275
Jul
from $274
Aug
from $381
Sep
from $410
Oct
from $383
Nov
from $381
Dec
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Jan
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Feb
from $741
Mar
from $520
Apr
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May
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Direct flights from Houston to Washington Dulles

Houston to Washington Dulles: Alternative routes

Compare routes from Houston to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

Houston to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found$274
Cheapest month to flyJuly
Average flight time3 hrs, 7 mins
Most popular airlineUnited
Average flights per week150

Finding cheap flights from Houston to Washington Dulles: Frequently asked questions

The best price we found for a return flight from Houston to Washington Dulles is $274. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 7 minutes is the average flight time from Houston to Washington Dulles.
United, Air New Zealand and Avianca fly direct from Houston to Washington Dulles.
As of June 2025, there are 150 flights per week flying from Houston to Washington Dulles.
The cheapest month to fly from Houston to Washington Dulles is usually June 2025.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Houston to Washington Dulles Airport on Wednesday, 2 July 2025.
Yes – the average flight time is 3 hours and 7 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

Travelling from Houston to Washington Dulles International Airport (IAD): What you need to know

  • Your adventure begins at one of Houston's main airports, George Bush Intercontinental Airport (IAH) or William P. Hobby Airport (HOU). Explore the options for booking a flight from Houston to Washington Dulles International Airport (IAD) jetting off from either of these.

  • Hop on a direct Houston to Washington Dulles International Airport flight and you'll be travelling for an average of 3 hours 5 minutes.

  • Washington DC is one hour ahead of Houston. Washington Dulles International Airport is located in Washington DC, which follows the UTC-4 timezone.

  • The busiest route is from George Bush Intercontinental Airport (IAH) to Washington Dulles International Airport (IAD), with 37 direct services every week. If you'd rather get moving right away, the earliest flight from IAH to IAD is the 7:20am United Airlines option. If you're looking to take off later, the final departure is at 7:59pm with United Airlines.

  • Leave plenty of time to get on your flight from Houston to IAD. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • With more people on the move during peak seasons, aim to get to your terminal even earlier. Two hours for domestic flights and up to four for international trips will help you stay ahead of the crowds.

Airports in Houston

George Bush Intercontinental Airport (IAH)

  • You can find a direct flight from Houston to Washington Dulles International Airport (IAD) leaving from George Bush Intercontinental Airport (IAH).

  • When jetting out of IAH, you can catch a direct flight from Houston to Washington Dulles International Airport with United Airlines.

  • United Airlines ranks first in bookings for flights from IAH to IAD.

  • United Airlines is the most punctual carrier on this route, with 76.64% of its services arriving as planned.

  • Travelling from central Houston to IAH takes about 50 minutes on public transport. If you ride-share, drive or take a cab, you'll cover the 27 kilometres in 20 minutes or so, depending on traffic conditions.

  • Want a stress-free start to your travels? Stay near George Bush Intercontinental Airport. Whether you're catching an early flight from Houston to Washington Dulles International Airport or prefer not to feel hurried, these hotels are the answer:

  • 78.42% of flights taking off from George Bush Intercontinental Airport land at their destination on time.

  • IAH is located at 16930 JFK Boulevard.

William P. Hobby Airport (HOU)

About Washington Dulles International Airport (IAD)

Getting from Washington Dulles International Airport (IAD) to central Washington DC

  • Washington Dulles International Airport is roughly 40 kilometres from central Washington DC. How long it'll take to get to the centre by car hire or cab will depend on the time of day. Do a little research before you go.

  • Travelling on public transport takes roughly 1 hour 10 minutes.

How to find the cheapest flights from Houston to Washington Dulles International Airport (IAD)

  • $137 is the lowest price for a one-way ticket from Houston to Washington Dulles International Airport. A return flight starts from $274. These fares can change based on demand.

  • To find cheap flights from Houston to IAD, book ahead. Airlines generally offer the most competitive fares when tickets first go on sale.

  • The 'Whole month' tool shows you the cheapest Houston to Washington Dulles International Airport tickets across every month. It's a great way to snap up a bargain if your travel plans are flexible.

  • Stay on top of deals for flight tickets from Houston to IAD by setting up a Price Alert. We'll send you an email or notification on the app when prices go down.

  • Filters make it easier to land a deal on your flight from Houston to Washington Dulles International Airport. Pick the departure times, carriers and stops that check all your boxes. Then sort the results by 'Cheapest' to find the best price quickly.

The best time to fly from Houston to Washington Dulles International Airport (IAD)

  • July is the most popular month for flights from Houston to Washington Dulles International Airport (IAD). Plan your visit to Washington DC in February if you'd rather be there when it's quieter.

  • Book a Houston to IAD flight ticket departing in July if you're eager to experience the city during its warmest month. Expect temperatures in Washington DC to range from 19ºC (66ºF) to 33ºC (91ºF).

  • January has temperatures of between -6ºC (21ºF) and 10ºC (50ºF). Look for cheap tickets from Houston to Washington Dulles International Airport around that time if you like travelling in cooler conditions.

More about Washington DC

Explore more of the United States

  • You've visited Washington DC, now it's time to explore more of the United States. Journey around 225 kilometres north-east to Philadelphia to check off its leading sights. From Independence Hall to Liberty Bell and Philadelphia Museum of Art, your itinerary will be busy.

  • Virginia Beach is another must-experience destination in the United States and is around 274 kilometres south-east of Washington DC. No trip is complete without dropping by Virginia Beach Oceanfront, Virginia Beach Boardwalk and Resort Beach.

Plan the rest of your trip from Houston to Washington D.C.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.