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Departing flights
Ranking & search details
3 nonstop, 39 with 1 connection, 6 with 2 · ranked by overall best · 16 hidden by your Most reliable time setting (they leave at other times of day) · showing the top 3
Most reliable time: morning departures (5–11 AM), the window with the best on-time odds for this trip. Turn off “Most reliable” under Departure time in Advanced settings to see every time.
Fares seen on this date: nonstop from 294 (recent searches, one way, per person; each card opens the live price)
32 matching trips
Why this is our top pick
- This morning flight leaves in the most reliable time of day on this route: its best departures have a 74% reliability rating vs 54% for afternoon departures.
- Compared with the next-best option (Delta 410 + Delta 1509 on the Airbus A320 or A319), it arrives on time 10 points more often; it flies a newer plane (about 20 vs 27 years old).
- Legroom was comparable across the flights we compared (30–31 in), so it didn't set them apart.
6:00 AM10:23 AMDCA → HOU
Delta · DL 410 / DL 1509
5h 18m1 stop
1h 12m in ATL
One ticket
79%arrive on time90% connections madeCheck fares
6:55 AM2:00 PMDCA → HOU
Southwest · WN 3346 / WN 745
8h 05m1 stop
3h 00m in TPA
One ticket
79%arrive on time96% connections madeCheck fares
Aircraft and legroom reflect the planes each flight has flown recently. Airlines can swap planes and seat maps change, so check the airline’s seat map when you book.
DCA → HOU
Washington to Houston: 1,056 nonstop flights a year
On time (12 months)
78%
Cancelled
1.9%
avg delay 15 min
Best time to leave
Before 9 AM
93% on time vs 61% 3 to 6 PM
Most reliable airline
Southwest
77% chance on time
Lowest nonstop fare seen in the next two months: $294 (Southwest 1494 on 2026-10-29). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines77%
1,056 flights · 78% on time as flown · 1.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
365 flights · avg delay 4 min
- Noon to 3 PM76%
332 flights · avg delay 16 min
- 3 to 6 PM61%
55 flights · avg delay 24 min
- 6 to 9 PM65%
304 flights · avg delay 26 min
Best day: Tuesday (80%). Worst: Sunday (72%).
Smarter routing
Nearby airports that run more on time
IAD → IAH 82% chance on time
Washington Dulles International Airport to George Bush Intercontinental Airport · 1,865 flights a year · 47 mi from your airports · yours: 77%
DCA → IAH 80% chance on time
Ronald Reagan Washington National Airport to George Bush Intercontinental Airport · 3,113 flights a year · 24 mi from your airports · yours: 77%
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure