BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
LGA→PWM

New York, NY (LGA) to Portland, ME (PWM) flight delay odds

73.8% of 1,137 official scheduled LGA-to-PWM flights arrived on time; 15.1% arrived at least 30 minutes late and 4.7% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALHigher disruption
73.8%arrived on time
15.1%30+ min late
4.7%cancelled
1,137scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.8%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+4.0 mincompleted flights

Which departure time was most reliable for LGA to PWM?

Among qualifying LGA-to-PWM departure window results, Early morning had the highest on-time rate: 90.4% of 83 flights. Night was lowest at 63.6% across 228 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning8390.4%4.8%1.2%
Late morning36280.7%7.7%5.2%
Afternoon33072.1%18.2%3.0%
Evening13466.4%20.9%6.0%
Night22863.6%22.8%7.0%

Which weekday was most reliable for LGA to PWM?

Among qualifying LGA-to-PWM weekday results, Saturday had the highest on-time rate: 79.7% of 123 flights. Sunday was lowest at 69.4% across 173 flights.

DayFlightsOn time30+ minCancelled
Monday16972.8%16.6%7.1%
Tuesday17474.7%16.7%4.0%
Wednesday16773.1%15.6%3.6%
Thursday16573.9%13.9%6.1%
Friday16674.7%15.7%3.6%
Saturday12379.7%11.4%1.6%
Sunday17369.4%15.0%6.4%

Which airline was most reliable for LGA to PWM?

Only Republic Airways met the LGA-to-PWM airline threshold: 73.4% of 1,107 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Republic Airways1,10773.4%15.4%4.9%
American Airlines2788.9%3.7%0.0%
Delta Air Lines366.7%33.3%0.0%

Which month was most reliable for LGA to PWM?

Among qualifying LGA-to-PWM month results, September 2025 had the highest on-time rate: 86.0% of 86 flights. July 2025 was lowest at 58.0% across 81 flights.

MonthFlightsOn time30+ minCancelled
July 20258158.0%23.5%12.3%
August 20258684.9%7.0%2.3%
September 20258686.0%9.3%1.2%
October 202514262.7%23.2%2.8%
November 20258169.1%19.8%6.2%
December 20257667.1%17.1%5.3%
January 20266177.0%9.8%8.2%
February 20265479.6%9.3%9.3%
March 20268360.2%15.7%15.7%
April 202613475.4%20.1%0.7%
May 202613082.3%7.7%0.8%
June 202612382.1%13.0%2.4%

What drove LGA to PWM delay minutes?

Late aircraft was the largest recorded LGA-to-PWM delay category, accounting for 50.7% of 15,395 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.2%
Late aircraft50.7%
National airspace21.4%
Weather1.7%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.