ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.
BDL → IAD
Hartford to Dulles: 1,071 nonstop flights a year
On time (12 months)
85%
Cancelled
2.1%
avg delay 12 min
Best time to leave
Before 9 AM
94% on time vs 56% noon to 3 PM
Most reliable airline
United
85% chance on time
Lowest nonstop fare seen in the next two months: $231 (United 635 on 2026-10-21). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Best trips
6 nonstop. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.
Best overall#1 · Nonstop · 1h 26m
6:00 AM → 7:26 AM
92%
arrive on time
94% on time · 2.0% cancel6:00 AM BDL → 7:26 AM IAD1h 26m
United 635
Boeing 737-900ER · 2–25 yrs oldFind United 635 fares Opens this date on Aviasales#2 · Nonstop · 1h 25m
10:33 AM → 11:58 AM
89%
arrive on time
90% on time · 1.4% cancel10:33 AM BDL → 11:58 AM IAD1h 25m
United 1786 · also flew as 2746, 1581
Boeing 737-700 · 3–28 yrs oldFind United 1786 fares Opens this date on Aviasales#3 · Nonstop · 1h 25m
7:44 PM → 9:10 PM
83%
arrive on time
84% on time · 1.3% cancel7:44 PM BDL → 9:10 PM IAD1h 25m
United 495
Boeing 737-700 or Airbus A319 · 18–28 yrs oldFind United 495 fares Opens this date on Aviasales#4 · Nonstop · 1h 39m
7:35 PM → 9:14 PM
78%
arrive on time
82% on time · 5.2% cancel7:35 PM BDL → 9:14 PM IAD1h 39m
Republic 3537 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–21 yrs oldFind 7:35 PM flight fares Opens this date on Aviasales#5 · Nonstop · 1h 26m
3:04 PM → 4:29 PM
75%
arrive on time
76% on time · 2.1% cancel3:04 PM BDL → 4:29 PM IAD1h 26m
United 1764
Boeing 737-700 or Airbus A319 · 23–28 yrs oldFind United 1764 fares Opens this date on Aviasales#6 · Nonstop · 1h 38m
2:45 PM → 4:23 PM
53%
arrive on time
56% on time · 4.0% cancel2:45 PM BDL → 4:23 PM IAD1h 38m
Republic 3664 · sold as American Eagle, Delta Connection or United Express
Embraer E170 or E175 · 4–21 yrs oldFind 2:45 PM flight fares Opens this date on Aviasales
Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes.
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines85%
878 flights · 87% on time as flown · 1.6% cancel
- Republic Airways (sold as American Eagle, Delta Connection or United Express)74%
193 flights · 72% on time as flown · 3.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM94%
360 flights · avg delay 4 min
- 9 AM to noon89%
265 flights · avg delay 10 min
- Noon to 3 PM56%
132 flights · avg delay 33 min
- 3 to 6 PM76%
110 flights · avg delay 15 min
- 6 to 9 PM85%
204 flights · avg delay 12 min
Best day: Saturday (89%). Worst: Sunday (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