Route Reliability

Route reliability

Fort Lauderdale (FLL) to Boston (BOS): which airline is most on time?

On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Fort Lauderdale, FL (FLL) to Boston, MA (BOS), September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Fort Lauderdale, FLBoston, MA

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Three-letter airport codes, nonstop U.S. domestic flights. One direction at a time.

Route at a glance · September 2025 to August 2026

FLL to BOS

Fort Lauderdale, FL to Boston, MA

On time
64.3%vs 75.6% U.S. average Worse than average
Cancelled
3.7%vs 1.9% U.S. average Worse than average
60+ min late
14.3%vs 8.1% U.S. average Worse than average
Scheduled flights
3,293in 12 months3 airlines
Most reliable airline
Delta Air Lines69.8% on time · 886 flights

On time less often than the U.S. average, with more cancellations.

Compared with all U.S. flights, September 2025 to August 2026. “About average” means within 1.5 points for on time, 0.3 for cancelled and 1 for 60+ minutes late.

Airlines on this route

Ranked by on-time arrival

Airlines from FLL to BOS, September 2025 to August 2026. Rates are shares of all scheduled flights.
Airline On time Cancelled 60+ min late Avg delay when late Diverted Flights
1. Delta Air Lines Most reliable 69.8% 3.2% 11.3% 77 min 0.1% 886
2. JetBlue Airways 63.6% 3.4% 15.3% 76 min 0.2% 1,960
3. Spirit Airlines 56.4% 6.0% 16.3% 77 min 0.0% 447

On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.

What this means

Delta Air Lines has the strongest record on this route.

  • Delta Air Lines had the best on-time record from Fort Lauderdale (FLL) to Boston (BOS): 69.8% of its 886 scheduled flights arrived within 15 minutes of schedule, compared with 56.4% for Spirit Airlines.
  • 3.7% of flights on this route were cancelled (about 1 in 27), 1.8 points higher than the U.S. average of 1.9%.
  • 14.3% of flights, about 1 in 7, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 77 min.
  • Overall, 64.3% of flights on this route arrived on time, 11.3 points lower than the U.S. average of 75.6%.
  • Over the last 3 years, November was the most reliable month on this route (76.4% on time) and July the least reliable (56.7%).
  • Cancellations peaked in July, when 4.8% of flights were cancelled.
  • Flights scheduled to depart 6 am to 7 am were the most punctual (89.3% on time); flights scheduled to depart 9 pm to 10 pm were the least (39.1%).
  • In the other direction, Boston (BOS) to Fort Lauderdale (FLL), 63.9% of flights were on time and 3.8% were cancelled. Compare airlines BOS to FLL.

Best and worst months to fly FLL to BOS

Jan 69.9%
Feb 64.4%
Mar 65.5%
Apr 70.8%
May 69.4%
Jun 66.9%
Jul 56.7%
Aug 65.3%
Sep 65.6%
Oct 72.3%
Nov 76.4%
Dec 64.9%
Share of scheduled flights on time 12-month average 64.3%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 69.9% 888
February 64.4% 976
March 65.5% 1,059
April 70.8% 985
May 69.4% 671
June 66.9% 620
July 56.7% 651
August 65.3% 658
September 65.6% 707
October 72.3% 757
November 76.4% 835
December 64.9% 973
Best and worst calendar month by airline, September 2023 to August 2026.
AirlineBest monthWorst month
Delta Air Lines November (85.8%) July (56.2%)
JetBlue Airways November (74.5%) July (56.7%)
Spirit Airlines October (76.5%) March (55.2%)

Month by month, last 12 months

Sep 68.1%
Oct 66.7%
Nov 73.0%
Dec 60.0%
Jan 63.8%
Feb 55.3%
Mar 58.9%
Apr 65.7%
May 81.6%
Jun 67.8%
Jul 51.9%
Aug 66.1%
Share of scheduled flights on time U.S. average 75.6%
All airlines combined, September 2025 to August 2026. Scale starts at zero.
Show as table
PeriodOn timeFlights
Sep 2025 68.1% 232
Oct 2025 66.7% 249
Nov 2025 73.0% 296
Dec 2025 60.0% 360
Jan 2026 63.8% 304
Feb 2026 55.3% 342
Mar 2026 58.9% 387
Apr 2026 65.7% 367
May 2026 81.6% 206
Jun 2026 67.8% 177
Jul 2026 51.9% 187
Aug 2026 66.1% 186

Best and worst departure times

<6a Insufficient sample
6a 89.3%
7a 78.9%
8a 88.5%
9a 77.5%
10a Insufficient sample
11a 67.7%
12p 55.7%
1p 48.6%
2p 53.5%
3p 50.0%
4p 50.6%
5p 50.8%
6p 48.3%
7p 57.4%
8p 63.1%
9p 39.1%
Share of scheduled flights on time
By scheduled local departure hour at FLL, September 2025 to August 2026. Hours with no scheduled flights are omitted. Scale starts at zero.
Show as table
PeriodOn timeFlights
Departing before 6 am Insufficient sample 1
Departing 6 am to 7 am 89.3% 242
Departing 7 am to 8 am 78.9% 332
Departing 8 am to 9 am 88.5% 183
Departing 9 am to 10 am 77.5% 120
Departing 10 am to 11 am Insufficient sample 28
Departing 11 am to noon 67.7% 396
Departing noon to 1 pm 55.7% 140
Departing 1 pm to 2 pm 48.6% 138
Departing 2 pm to 3 pm 53.5% 200
Departing 3 pm to 4 pm 50.0% 78
Departing 4 pm to 5 pm 50.6% 166
Departing 5 pm to 6 pm 50.8% 126
Departing 6 pm to 7 pm 48.3% 143
Departing 7 pm to 8 pm 57.4% 155
Departing 8 pm to 9 pm 63.1% 712
Departing 9 pm to 10 pm 39.1% 133
Woman at an airport window watching a plane take off
Photo: Depositphotos (licensed stock, illustrative only). Credits

Sources & data dates

Source
U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
Period
September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
Data through
August 2026
Processed
2026-11-03
Scope
Nonstop scheduled flights from Fort Lauderdale, FL (FLL) to Boston, MA (BOS), one direction. Airlines that report to the DOT only.
Method
Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.

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