Historical on-time performance
New York to Washington
229 miData through May 2026Source: US DOT · BTS
Flights on LGA–IAD arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled7.2%of scheduled flights
based on 956 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysOn-time69%Medianon timep9070 minCancel7.2%Flights956
Why flights run late
Delay causes
- Airline17%
- Weather3%
- Air traffic (NAS)28%
- Late aircraft52%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather39%
- Air traffic (NAS)61%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 69 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly LGA → IAD
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 90% on time.
- Mornings90% on time · p90 5 min · 687 flights
- Middays85% on time · p90 20 min · 503 flights
- Evenings70% on time · p90 65 min · 660 flights
- Afternoons67% on time · p90 70 min · 849 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 84% on time.
- Saturdays84% on time · p90 25 min · 374 flights
- Tuesdays80% on time · p90 30 min · 382 flights
- Wednesdays76% on time · p90 55 min · 378 flights
- Sundays76% on time · p90 40 min · 399 flights
- Thursdays76% on time · p90 50 min · 379 flights
- Mondays74% on time · p90 55 min · 390 flights
- Fridays72% on time · p90 50 min · 402 flights
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