Check security wait times on IAH's website to ensure a smooth departure, especially during busy travel periods.

Round-trip from | $128 (Mytrip) |
|---|---|
One-way from | $67 (Kiwi.com) |
Popular in | December |
Cheapest in | August |
Average price | $415 |
Fly from
Fly to
Route
Depart
Return
Price
HoustonWashington, D.C.
IAH - DCA
IAHDCA
Houston George Bush Intcntl
Tue 2/17
6:45 am-1:15 pm
1 stop29h 30m
Washington, D.C. Reagan-National
Fri 2/20
6:00 pm-12:33 am
1 stop7h 33m
HoustonWashington, D.C.
HOU - DCA
HOUDCA
Houston Hobby
Tue 2/3
8:10 am-12:05 pm
Nonstop2h 55m
Washington, D.C. Reagan-National
Sat 2/7
3:55 pm-6:45 pm
Nonstop3h 50m
HoustonWashington, D.C.
HOU - DCA
HOUDCA
Houston Hobby
Sat 2/21
5:15 am-12:50 pm
2 stops6h 35m
Washington, D.C. Reagan-National
Thu 3/5
5:40 pm-9:45 pm
1 stop5h 05m
HoustonWashington, D.C.
IAH - DCA
IAHDCA
Houston George Bush Intcntl
Sat 3/21
7:35 am-11:35 am
Nonstop3h 00m
Washington, D.C. Reagan-National
Tue 3/24
11:00 am-1:40 pm
Nonstop3h 40m
HoustonWashington, D.C.
IAH - DCA
IAHDCA
Houston George Bush Intcntl
Wed 3/18
7:35 am-11:36 am
Nonstop3h 01m
Washington, D.C. Reagan-National
Mon 3/23
12:32 pm-3:15 pm
Nonstop3h 43m
HoustonWashington, D.C.
IAH - DCA
IAHDCA
Houston George Bush Intcntl
Thu 3/12
7:35 am-11:36 am
Nonstop3h 01m
Washington, D.C. Reagan-National
Sat 3/21
11:00 am-1:40 pm
Nonstop3h 40m
HoustonWashington, D.C.
IAH - DCA
IAHDCA
Houston George Bush Intcntl
Thu 3/19
2:45 pm-6:46 pm
Nonstop3h 01m
Washington, D.C. Reagan-National
Wed 3/25
6:00 am-8:42 am
Nonstop3h 42m
HoustonWashington, D.C.
IAH - DCA
IAHDCA
Houston George Bush Intcntl
Mon 2/23
7:50 pm-11:50 pm
Nonstop3h 00m
Washington, D.C. Reagan-National
Tue 4/7
6:00 am-8:31 am
Nonstop3h 31m
HoustonWashington, D.C.
IAH - DCA
IAHDCA
Houston George Bush Intcntl
Sat 3/21
7:50 pm-11:50 pm
Nonstop3h 00m
Washington, D.C. Reagan-National
Mon 3/23
7:59 pm-10:40 pm
Nonstop3h 41m
HoustonWashington, D.C.
IAH - DCA
IAHDCA
Houston George Bush Intcntl
Wed 2/11
8:00 pm-11:59 pm
Nonstop2h 59m
Washington, D.C. Reagan-National
Sat 2/14
12:47 pm-3:32 pm
Nonstop3h 45m
Booking 46 days in advance of your planned departure date is, on average, the best time to get cheap flights from Houston to Washington, D.C. Reagan-National Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, November is the cheapest month in which you can book a flight from Houston to Washington, D.C. Reagan-National Airport (average of $130). Flying from Houston to Washington, D.C. Reagan-National Airport in July is currently the most expensive (average of $269). 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.
A simple way to save on the total cost of your ticket is to fly from Houston to Washington, D.C. Reagan-National Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 27% on your trip compared to booking a flight at noon.
Travelers seeking maximum savings on their Houston to Washington, D.C. Reagan-National Airport flight should consider departing on Friday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
About 25% of weekly flights between Houston and Washington, D.C. have experienced delays in the past year, with the average delay time being 132 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Southwest have had the lowest number of delays on this route, with just 25% of flights being delayed.
Overall
Food
Comfort
Crew
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Food
Comfort
Crew
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Food
Comfort
Crew
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Food
Comfort
Crew
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Food
Comfort
Crew
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
Overall
Food
Comfort
Crew
Boarding
Entertainment
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$67 | Average$195 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$130 | Average$300 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$144 | Average$326 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$147 | Average$415 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$181 | Average$387 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$221 | Average$354 | FlexibilityNo cancel fee | On-time63% |