NK2231

NK2231 (Spirit Airlines) is a multi-stop service on 6 routes, busiest Boston to Fort Lauderdale. Of 186 departures recorded from May 2025 to May 2026, 43.8% left on time, according to the US BTS.

Recorded departures by month

All legs under this number combined; see the leg table.

Months without data are left blank.

The most recent periods11 periods
PeriodDepartures 2025Departures 2026Change vs last year
January–25–
February–24–
March–31–
April–29–
May141▼ 92.9%
June25––
July7––
August5––
September1––
October––in progress
November–––
December24––

according to the US BTS · May 2025 → May 2026

On-time departures by month

All legs combined

Months without data are left blank.

On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.

The most recent periods11 periods
PeriodOn time 2025On time 2026Change vs last year
January–43.5%–
February–30.0%–
March–22.2%–
April–44.8%–
May53.9%0.0%▼ 100.0%
June58.3%––
July66.7%––
August40.0%––
September100.0%––
October––in progress
November–––
December55.0%––

according to the US BTS · May 2025 → May 2026

Average departure delay by month

All legs combined

Months without data are left blank.

according to the US BTS · May 2025 → May 2026

Cancelled departures by month

All legs combined

Months without data are left blank.

The most recent periods11 periods
PeriodCancelled 2025Cancelled 2026Change vs last year
January–2–
February–4–
March–4–
April–0–
May10▼ 100.0%
June1––
July1––
August0––
September0––
October––in progress
November–––
December4––

according to the US BTS · May 2025 → May 2026

This is not a forecast

This is a historical record of departures already flown, not a forecast for your flight.

This number flies several legs

Several legs: the headline figure averages all of them. See the leg table.

Cancellation share

  • Not cancelled 90.9% 169
  • Cancelled 9.1% 17

Share of all recorded flights in the period, all legs. · May 8, 2025 → May 1, 2026

On time, leg by leg

  1. BOS–FLL86 34.2%
  2. IAH–PHL46 58.1%
  3. LBE–MCO31 44.4%

Departures within 15 minutes of schedule; small figure = departures recorded.

Legs flown under this number

3
Monthly figures
PeriodDepartures With departure delay recordedOn time Cancelled
May 2025 14 13 53.9% 1
June 2025 25 24 58.3% 1
July 2025 7 6 66.7% 1
August 2025 5 5 40.0% 0
September 2025 1 1 100.0% 0
December 2025 24 20 55.0% 4
January 2026 25 23 43.5% 2
February 2026 24 20 30.0% 4
March 2026 31 27 22.2% 4
April 2026 29 29 44.8% 0
May 2026 1 1 0.0% 0

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