ON TIMEBOARD
MOB Mobile / IAD Washington

MOB → IAD on time

Mobile (Mobile, AL) to Washington Dulles (Washington, DC). Every scheduled flight, September 2025 to August 2026.

On time
84%
arrived < 15 min late
Cancelled
0.4%
451 flights
Typical arrival
−13 min
median vs schedule
When late
+100 min
average delay
Flights / day
1
1 airline

84% of flights from Mobile to Washington arrived on time over the past 12 months. That is better than the typical U.S. route. 9% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for MOB → IAD: when a flight was late, it was under 45 minutes late 40% of the time. About 1 in 14 flights landed an hour or more late, and 1 in 64 three hours or more; 0.4% were cancelled outright.

Share of all 451 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
United Airlines45184%0.4%−13 min7.3%+100 minCommutAir

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at MOB). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%8 a.m. departures: too few flights (86 flights)8a9 a.m. departures: too few flights9a10 a.m. departures: too few flights10a11 a.m. departures: too few flights11anoon departures: 84% on time (365 flights)8412p
MOB → IAD, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By month

Each calendar month pooled over 2023–2026. Best: September (91%). Worst: December (73%).

40%70%100%Jan: too few flights (98 flights)JanFeb: too few flights (84 flights)FebMar: too few flights (93 flights)MarApr: too few flights (90 flights)AprMay: too few flights (93 flights)MayJun: too few flights (97 flights)JunJul: 79% on time (154 flights)79JulAug: 81% on time (155 flights)81AugSep: 91% on time (118 flights)91SepOct: 89% on time (111 flights)89OctNov: 88% on time (110 flights)88NovDec: 73% on time (108 flights)73Dec

By day of week

DayFlightsOn timeCancelled
Monday69——
Tuesday59——
Wednesday59——
Thursday68——
Friday68——
Saturday60——
Sunday68——

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Late inbound plane 63%Severe weather 19%Airline (crew, maintenance, ops) 9%Air traffic & airport (NAS) 9%

Cancellations: weather 2

Month by month

Not enough months with data to draw a trend.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

FlightDepartsFlightsOn timeCancelledTypical arrivalOperated by
UA 431412:50 p.m.15684%0.0%−11 minCommutAir

Questions

How often are flights from MOB to IAD on time?

84% of 451 scheduled flights from Mobile, AL to Washington, DC arrived within 15 minutes of schedule between September 2025 and August 2026. 0.4% were cancelled.

What month has the most delays from MOB to IAD?

December (73% on time). The best month is September (91%), over 2023–2026.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.