IAD to LGA flight delays & on-time performance
Nonstop flights from Washington Dulles International Airport to LaGuardia Airport · 228 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAD or LGA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Washington (IAD) to New York (LGA) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 6.5% were cancelled, and 10% arrived an hour or more late.
- Republic Airways is the only airline reporting nonstop flights on this route.
- Departures scheduled around 8am did best (87% on time); around 12pm did worst (69%).
- Saturday was the most reliable day to fly (86% on time) and Friday the least (69%).
- The largest source of delay minutes was air traffic control & airport congestion (55%).
Which airline is most on time from IAD to LGA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 74% | 6.5% | 20 min | 9.8% | 999 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am87%120 flights
- 12pm69%334 flights
- 5pm72%237 flights
- 10pm76%308 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%9.2% cancelled
- Tuesday76%5.9% cancelled
- Wednesday72%7.3% cancelled
- Thursday69%5.5% cancelled
- Friday69%4.1% cancelled
- Saturday86%5.4% cancelled
- Sunday73%8.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion55%
- Late-arriving aircraft24%
- Airline (crew, maintenance, cleaning, fueling)17%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather51%
- Air traffic control & airport congestion49%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
IAD to LGA: common questions
- How often are IAD to LGA flights on time?
- 74% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Washington to New York cancelled?
- 6.5% of scheduled flights were cancelled (65 of 999).
- How long are typical delays?
- Across all flights the average arrival delay was 20 min (early arrivals count as zero). Flights that were late arrived 72 min behind schedule on average, and 9.8% of flights were an hour or more late.
- How long is taxi time at IAD?
- Flights on this route spent 31 min taxiing from the gate to takeoff on average.
Related routes
Return trip: LGA to IAD — 77% on time
More flights from Washington
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAD → LGA, nonstop flights by US airlines that report to the DOT. How we calculate this.