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Ranking & search details
6 nonstop, 11 with 1 connection · ranked by overall best · 9 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.
8 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 91% reliability rating vs 46% for midday departures.
- Compared with the next-best option (United 1926 on the Boeing 737 MAX 8), it arrives on time 3 points more often.
- Legroom was comparable across the flights we compared (30 in), so it didn't set them apart.
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.
PWM → IAD
Portland to Dulles: 701 nonstop flights a year
On time (12 months)
85%
Cancelled
2.1%
avg delay 11 min
Best time to leave
9 AM to noon
95% on time vs 78% 6 to 9 PM
Most reliable airline
Republic
83% chance on time
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.
- Republic Airways (sold as American Eagle, Delta Connection or United Express)83%
680 flights · 85% on time as flown · 2.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM94%
136 flights · avg delay 3 min
- 9 AM to noon95%
165 flights · avg delay 3 min
- Noon to 3 PM78%
192 flights · avg delay 16 min
- 6 to 9 PM78%
208 flights · avg delay 17 min
Best day: Friday (89%). Worst: Monday (84%).
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