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Cheap Flights from Houston (HOUA) to Washington Dulles (IAD)

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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 Airport

Looking for a cheap last-minute deal or the best return flight from Houston to Washington Dulles Airport? If you want to travel next month, return fares start from £99. Find the lowest prices on one-way and return tickets right here.
Washington D.C..£44 per passenger.Departing Tue, 21 Apr.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Houston George Bush Intercntl. on Tue, 21 Apr, arriving in Washington Dulles.Price includes taxes and charges.From £44, select.
Washington D.C..£44 per passenger.Departing Mon, 4 May.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Houston George Bush Intercntl. on Mon, 4 May, arriving in Washington Dulles.Price includes taxes and charges.From £44, select.
Washington D.C..£44 per passenger.Departing Tue, 9 Jun.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Houston George Bush Intercntl. on Tue, 9 Jun, arriving in Washington Dulles.Price includes taxes and charges.From £44, select.
Washington D.C..£83 per passenger.Departing Sun, 5 Jul.One-way flight with Allegiant Air.Outbound indirect flight with Allegiant Air, departs from Houston Hobby on Sun, 5 Jul, arriving in Washington Dulles.Price includes taxes and charges.From £83, select.
Washington D.C..£99 per passenger.Departing Sun, 9 Aug.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Houston George Bush Intercntl. on Sun, 9 Aug, arriving in Washington Dulles.Price includes taxes and charges.From £99, select.
Washington D.C..£114 per passenger.Departing Tue, 9 Jun.One-way flight with United.Outbound direct flight with United departs from Houston George Bush Intercntl. on Tue, 9 Jun, arriving in Washington Dulles.Price includes taxes and charges.From £114, select.
Washington D.C..£114 per passenger.Departing Wed, 22 Apr.One-way flight with United.Outbound direct flight with United departs from Houston George Bush Intercntl. on Wed, 22 Apr, arriving in Washington Dulles.Price includes taxes and charges.From £114, select.
Washington D.C..£114 per passenger.Departing Tue, 5 May.One-way flight with United.Outbound direct flight with United departs from Houston George Bush Intercntl. on Tue, 5 May, arriving in Washington Dulles.Price includes taxes and charges.From £114, select.
Washington D.C..£171 per passenger.Departing Tue, 10 Nov.One-way flight with United.Outbound direct flight with United departs from Houston George Bush Intercntl. on Tue, 10 Nov, arriving in Washington Dulles.Price includes taxes and charges.From £171, select.
Washington D.C..£171 per passenger.Departing Thu, 24 Dec.One-way flight with United.Outbound direct flight with United departs from Houston George Bush Intercntl. on Thu, 24 Dec, arriving in Washington Dulles.Price includes taxes and charges.From £171, select.
Washington D.C..£174 per passenger.Departing Tue, 4 Aug.One-way flight with United.Outbound direct flight with United departs from Houston George Bush Intercntl. on Tue, 4 Aug, arriving in Washington Dulles.Price includes taxes and charges.From £174, select.
Washington D.C..£174 per passenger.Departing Mon, 6 Jul.One-way flight with United.Outbound direct flight with United departs from Houston George Bush Intercntl. on Mon, 6 Jul, arriving in Washington Dulles.Price includes taxes and charges.From £174, select.
Washington D.C..£179 per passenger.Departing Mon, 19 Oct.One-way flight with Delta.Outbound indirect flight with Delta, departs from Houston Hobby on Mon, 19 Oct, arriving in Washington Dulles.Price includes taxes and charges.From £179, select.
Washington D.C..£180 per passenger.Departing Wed, 16 Sep.One-way flight with Delta.Outbound indirect flight with Delta, departs from Houston Hobby on Wed, 16 Sep, arriving in Washington Dulles.Price includes taxes and charges.From £180, select.
Washington D.C..£180 per passenger.Departing Thu, 11 Feb.One-way flight with Delta.Outbound indirect flight with Delta, departs from Houston Hobby on Thu, 11 Feb, arriving in Washington Dulles.Price includes taxes and charges.From £180, select.
Washington D.C..£208 per passenger.Departing Thu, 11 Feb.One-way flight with United.Outbound direct flight with United departs from Houston George Bush Intercntl. on Thu, 11 Feb, arriving in Washington Dulles.Price includes taxes and charges.From £208, 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 April.
Apr
from £44
May
from £44
Jun
from £44
Jul
from £83
Aug
from £99
Sep
from £180
Oct
from £179
Nov
from £171
Dec
from £171
Jan
Find prices
Feb
from £180
Mar
Find prices

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.

Washington Ronald Reagan

3 miles from central Washington D.C.
Closest
from £60
Search flights

Camp Springs Andrews AFB

11 miles from central Washington D.C.
Search flights

Washington Dulles

23 miles from central Washington D.C.
from £44
Search flights

Baltimore Washington International

27 miles from central Washington D.C.
Cheapest
from £33
Search flights

Manassas

29 miles from central Washington D.C.
Search flights

Houston to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight found£44
Cheapest month to flyApril
Average flight time3 hrs, 9 mins
Most popular airlineUnited
Average flights per week129

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 £89. 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 9 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 April 2026, there are 129 flights per week flying from Houston to Washington Dulles.
The cheapest month to fly from Houston to Washington Dulles is usually June.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Houston to Washington Dulles Airport on Tuesday, 23 June 2026.
Yes – the average flight time is 3 hours and 9 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

  • Start your adventure at Houston George Bush Intercontinental Airport (IAH), the main airport in Houston. Look for flights from Houston to Washington Dulles International Airport (IAD) that jet out of this terminal.

  • Expect to be travelling for 3 hours 5 minutes. That's the average time for a direct Houston to Washington Dulles International Airport flight.

  • Washington Dulles International Airport is located in Washington DC. The city runs on the UTC-5 timezone and is one hour ahead of Houston.

  • With 36 direct weekly flights between the two airports, Houston George Bush Intercontinental Airport (IAH) to Washington Dulles International Airport (IAD) is the busiest route. United Airlines operates the earliest flight at 7:20am. If you prefer to get more out of your day before you fly, the last flight from IAH to IAD is with United Airlines at 7:59pm.

  • Leave plenty of time to get on your flight from Houston to IAD. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.

  • Peak months like July or holiday periods such as Christmas and spring break will mean bigger lines at check-in and security. Travelling then? Play it safe and head to the terminal even earlier. Arriving two hours before domestic flights and up four hours ahead of international flights is a smart move.

Airports in Houston

Houston George Bush Intercontinental Airport (IAH)

  • Fly without interruptions from Houston George Bush Intercontinental Airport (IAH). Direct flights from Houston to Washington Dulles International Airport (IAD) are available from here.

  • United Airlines is a popular carrier that operates direct flights from Houston to Washington Dulles International Airport departing from IAH.

  • The preferred choice for passengers flying between IAH and IAD is United.

  • With 78.99% of services landing as planned, United is the highest-rated carrier for punctuality on this route.

  • The journey from central Houston to IAH takes about 1 hour 10 minutes by public transport. If you drive, ride-share or take a taxi, you'll cover the 40 kms (25 miles) in 30 minutes or so, depending on traffic conditions.

  • Want an easy start to your journey? Stay near Houston George Bush Intercontinental Airport. Whether you're boarding an early flight from Houston to Washington Dulles International Airport or just don't like being rushed, these hotels are just what you're after:

  • 79% of flights that take off from Houston George Bush Intercontinental Airport make it to their destination on time.

  • You'll find IAH at 16930 JFK Boulevard.

Houston Hobby Airport (HOU)

About Washington Dulles International Airport (IAD)

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

  • From Washington Dulles International Airport, central Washington DC is around 40 kms (25 miles) away. It takes about 45 minutes to reach the city centre by car.

  • If you're travelling on public transport, expect a journey of around 1 hour 10 minutes.

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

  • The cheapest price we've found for a one-way ticket from Houston to Washington Dulles International Airport is £44. For a return flight on this route, the best price is £89. Depending on when and how early you book, these fares may change.

  • Booking ahead of time is often the key to scoring a cheap flight from Houston to IAD. Airlines adjust prices based on demand, so the closer you get to departure, the more you'll likely spend on your ticket.

  • Affordable Houston to Washington Dulles International Airport tickets are easier to find if you're not locked into specific dates. Use the 'Whole month' search function to compare fares throughout the month and then pick the cheapest day.

  • You don't need to search every day to find out if fares have dropped when you set up a Price Alert. We'll let you know the moment a better deal is available on plane tickets from Houston to IAD.

  • Filters make it easier to land a deal on your flight from Houston to Washington Dulles International Airport. Choose the airlines, flight times and number of stops that check all your boxes. Then sort the results by 'Cheapest' to find the most affordable option fast.

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

  • Think about the kind of holiday you want when deciding your trip dates. February is the quietest month to go to Washington DC. June is when most people book flights from Houston to Washington Dulles International Airport (IAD), which may be ideal if you enjoy travelling when it's busier.

  • Lock in a Houston to IAD plane 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 to 33ºC.

  • Search for cheap tickets from Houston to Washington Dulles International Airport in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between -6ºC and 10ºC.

More about Washington DC

Explore more of the United States

  • You've seen Washington DC, now it's time to discover other corners of the United States. Journey around 225 kms (140 miles) northeast to Philadelphia to check off its leading sights. From Independence Hall to Liberty Bell and Philadelphia Museum of Art, you'll have a full itinerary ahead.

  • Around 274 kms (170 miles) southeast of Washington DC, Virginia Beach is another favourite stop in the United States. Get a taste of what this destination has to offer at Virginia Beach Boardwalk, Resort Beach and Neptune's Park.

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.