Airports › Maine
Airport · 12 months to July 2026
Portland International Jetport: delays and on-time record
Portland, Maine
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live airport status.
Reporting carriers scheduled 10,925 domestic departures from Portland International Jetport (PWM), Portland, in the 12 months to July 2026: about 30 a day to 21 destinations.
80.0% of those flights left the gate less than 15 minutes late, 3.9 points above the national departure figure of 76.1%. Flights arriving at PWM were on time 76.2% of the time, level with the national arrival figure of 76.0%.
2.6% of scheduled departures were cancelled (national: 1.8%), and the average departure delay, counting early and on-time departures as zero, was 17.2 min.
Republic Airline is the largest reporting carrier at PWM with 32% of departures. Among carriers with at least 120 departures, Southwest Airlines had the highest on-time arrival share for its PWM departures (81.3%) and SkyWest Airlines the lowest (65.1%).
On-time departures are about level with the previous 12 months (80.2%).
Of the delay minutes that carriers assigned to a BTS cause category for flights leaving PWM, air carrier 37%, late-arriving aircraft 31% and national aviation system 28%.
- On time 78.2%
- Arrived 15+ minutes late 18.8%
- Cancelled 2.6%
- Diverted 0.4%
As origin and as destination, against the nation
| Measure | Departures from PWM | Arrivals at PWM | All reported flights | PWM departures, previous 12 months |
|---|---|---|---|---|
| Departed on time (less than 15 min late) | 80.0% | 76.2% | 76.1% | 80.2% |
| Arrived on time | 78.2% | 76.2% | 76.0% | 77.3% |
| Cancelled | 2.6% | 2.6% | 1.8% | 2.2% |
| Diverted | 0.4% | 0.1% | 0.3% | 0.3% |
| Average departure delay (late minutes only) | 17.2 min | 15.6 min | 17.4 min | 17.9 min |
| Arrival delay minutes per 100 flights | 1,755 | 1,481 | 1,684 | 1,858 |
| Scheduled flights | 10,925 | 10,924 | 7,043,858 | 11,550 |
12 months to July 2026. The first column follows flights that left PWM; the second follows flights that landed there. Year on year, on-time departures moved −0.2 pts.
Airlines at PWM
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| YX Republic Airline | 3,507 | 32% | 79.8% | 2.8 min | 4.0% |
| AA American Airlines | 1,963 | 18% | 77.4% | 12.7 min | 1.4% |
| WN Southwest Airlines | 1,655 | 15% | 81.3% | 4.8 min | 0.8% |
| DL Delta Air Lines | 1,196 | 11% | 81.1% | 6.5 min | 1.1% |
| UA United Airlines | 854 | 8% | 77.4% | 9.7 min | 1.5% |
| OH PSA Airlines | 682 | 6% | 70.5% | 18.0 min | 6.5% |
| OO SkyWest Airlines | 436 | 4% | 65.1% | 23.4 min | 2.8% |
| B6 JetBlue Airways | 431 | 4% | 76.1% | 9.6 min | 3.2% |
| MQ Envoy Air | 196 | 2% | 78.6% | 4.5 min | 4.1% |
Departures from PWM by reporting carrier, ordered by flights; on time means the flight reached its destination less than 15 minutes late. Green is at or above the airport's overall share of 78.2%. Carriers fly different routes at different hours, so the rows are not a like-for-like test.
Busiest routes from PWM
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| PWM–ORD | Portland to Chicago | 1,494 | 75.3% | 9.8 min | 3.5% |
| PWM–BWI | Portland to Baltimore | 1,342 | 81.8% | 4.7 min | 0.9% |
| PWM–LGA | Portland to New York | 1,183 | 78.1% | 8.0 min | 4.5% |
| PWM–DCA | Portland to Washington | 1,159 | 71.4% | 19.8 min | 3.7% |
| PWM–EWR | Portland to Newark | 1,082 | 80.2% | 3.1 min | 3.7% |
| PWM–CLT | Portland to Charlotte | 708 | 80.5% | 7.0 min | 1.1% |
| PWM–IAD | Portland to Washington | 686 | 84.3% | -0.3 min | 2.3% |
| PWM–PHL | Portland to Philadelphia | 676 | 76.8% | 10.8 min | 3.4% |
| PWM–ATL | Portland to Atlanta | 642 | 80.1% | 7.5 min | 1.1% |
| PWM–DTW | Portland to Detroit | 613 | 78.8% | 7.6 min | 1.0% |
| PWM–JFK | Portland to New York | 398 | 76.6% | 7.0 min | 4.8% |
| PWM–DEN | Portland to Denver | 214 | 71.0% | 15.1 min | 0.0% |
| PWM–BNA | Portland to Nashville | 159 | 72.3% | 9.9 min | 0.6% |
| PWM–MDW | Portland to Chicago | 151 | 86.8% | 0.8 min | 0.0% |
| PWM–DFW | Portland to Dallas/Fort Worth | 149 | 79.2% | -3.5 min | 2.7% |
| PWM–MSP | Portland to Minneapolis | 143 | 89.5% | -4.3 min | 0.0% |
The 16 busiest of 21 routes with reported flights. Routes with at least 10 flights a month have their own page.
Month by month
By scheduled departure hour
Among hours with at least 219 departures, 8 am to 9 am had the highest on-time share (92.3% of 274 flights) and 5 pm to 6 pm the lowest (65.8% of 1,081).
Delay causes
Cancellations by reported reason (285 in the period): air carrier 19%, weather 58%, national aviation system 22%, security 0%.
Checkpoint volumes
TSA publishes daily checkpoint passenger counts for the country as a whole, not for PWM on its own. The national series through September 2026 is on the checkpoint volumes page.
Questions and answers
How often do flights leave PWM on time?
80.0% of the 10,925 scheduled domestic departures in the 12 months to July 2026 left less than 15 minutes late; the national figure was 76.1%. 2.6% were cancelled.
How often do flights arrive at PWM on time?
76.2% of 10,924 scheduled arrivals were on time by the BTS definition, against 76.0% nationally.
Which airline has the highest on-time share at PWM?
Counting departures from PWM and whether they reached their destination on time, Southwest Airlines had the highest share (81.3% of 1,655 flights), then Delta Air Lines (81.1%) and Republic Airline (79.8%). Carriers fly different routes at different hours, so the figures are not a like-for-like test.
What causes delays at PWM?
For departures from PWM that reached their destination 15 or more minutes late, carriers attributed the delay minutes as follows: air carrier 37%, late-arriving aircraft 31%, national aviation system 28%, extreme weather 3%, security 0%.
What time of day has the highest on-time share at PWM?
Departures scheduled from 8 am to 9 am local time left on time 92.3% of the time, the highest of any hour with enough flights to compare; 5 pm to 6 pm was lowest at 65.8%.
Is it getting better?
On-time departures for the 12 months to July 2026 were 80.0%, about level with the previous 12 months (80.2%). The monthly chart shows each of the last 36 months, and each month has its own page.
Does this page show today's delays at PWM?
No. BTS publishes on-time records about two months after the month ends, so this page is a monthly history through July 2026. For live conditions use the FAA airport status service or your airline.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026; airport name from the BTS airport lookup table. US government works in the public domain. Domestic scheduled flights by reporting carriers only: international flights, charters and smaller carriers are not in the source. Totals and averages only; no individual flight or aircraft is identified. See the methodology; report processing errors through corrections.