Airports › Idaho
Airport · 12 months to July 2026
Joslin Field - Magic Valley Regional: delays and on-time record
Twin Falls, Idaho
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.
Joslin Field - Magic Valley Regional (TWF) in Twin Falls, Idaho had 831 scheduled domestic departures by reporting carriers in the 12 months to July 2026, about 2 a day, on 1 route.
95.9% of those flights left the gate less than 15 minutes late, 19.8 points above the national departure figure of 76.1%. Flights arriving at TWF were on time 92.4% of the time, 16.4 points above the national arrival figure of 76.0%.
0.5% of scheduled departures were cancelled (national: 1.8%), and the average departure delay, counting early and on-time departures as zero, was 4.9 min.
SkyWest Airlines is the largest reporting carrier at TWF with 100% of departures.
On-time departures are up 1.2 points on the previous 12 months (94.7%).
Of the delay minutes that carriers assigned to a BTS cause category for flights leaving TWF, air carrier 78%, extreme weather 20% and national aviation system 2%.
- On time 94.9%
- Arrived 15+ minutes late 4.6%
- Cancelled 0.5%
- Diverted 0.0%
As origin and as destination, against the nation
| Measure | Departures from TWF | Arrivals at TWF | All reported flights | TWF departures, previous 12 months |
|---|---|---|---|---|
| Departed on time (less than 15 min late) | 95.9% | 91.7% | 76.1% | 94.7% |
| Arrived on time | 94.9% | 92.4% | 76.0% | 93.4% |
| Cancelled | 0.5% | 0.5% | 1.8% | 0.0% |
| Diverted | 0.0% | 0.0% | 0.3% | 0.1% |
| Average departure delay (late minutes only) | 4.9 min | 7.2 min | 17.4 min | 5.9 min |
| Arrival delay minutes per 100 flights | 525 | 675 | 1,684 | 622 |
| Scheduled flights | 831 | 831 | 7,043,858 | 697 |
12 months to July 2026. The first column follows flights that left TWF; the second follows flights that landed there. Year on year, on-time departures moved +1.2 pts.
Airlines at TWF
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| OO SkyWest Airlines | 831 | 100% | 94.9% | -8.2 min | 0.5% |
Departures from TWF 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 94.9%. Carriers fly different routes at different hours, so the rows are not a like-for-like test.
Busiest routes from TWF
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| TWF–SLC | Twin Falls to Salt Lake City | 831 | 94.9% | -8.2 min | 0.5% |
Routes with at least 10 flights a month have their own page.
Month by month
By scheduled departure hour
Among hours with at least 30 departures, 6 am to 7 am had the highest on-time share (97.3% of 365 flights) and 3 pm to 4 pm the lowest (94.5% of 307).
Delay causes
Cancellations by reported reason (4 in the period): air carrier 0%, weather 100%, national aviation system 0%, security 0%.
Checkpoint volumes
TSA publishes daily checkpoint passenger counts for the country as a whole, not for TWF on its own. The national series through September 2026 is on the checkpoint volumes page.
Questions and answers
How often do flights leave TWF on time?
95.9% of the 831 scheduled domestic departures in the 12 months to July 2026 left less than 15 minutes late; the national figure was 76.1%. 0.5% were cancelled.
How often do flights arrive at TWF on time?
92.4% of 831 scheduled arrivals were on time by the BTS definition, against 76.0% nationally.
Which airline has the highest on-time share at TWF?
Only one reporting carrier has enough departures here to report a share.
What causes delays at TWF?
For departures from TWF that reached their destination 15 or more minutes late, carriers attributed the delay minutes as follows: air carrier 78%, extreme weather 20%, national aviation system 2%, security 0%, late-arriving aircraft 0%.
What time of day has the highest on-time share at TWF?
Departures scheduled from 6 am to 7 am local time left on time 97.3% of the time, the highest of any hour with enough flights to compare; 3 pm to 4 pm was lowest at 94.5%.
Is it getting better?
On-time departures for the 12 months to July 2026 were 95.9%, up 1.2 points on the previous 12 months (94.7%). 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 TWF?
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.