Route Reliability

Route reliability

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

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

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

Boston, MAFort Lauderdale, FL

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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

BOS to FLL

Boston, MA to Fort Lauderdale, FL

On time
63.9%vs 75.6% U.S. average Worse than average
Cancelled
3.8%vs 1.9% U.S. average Worse than average
60+ min late
12.9%vs 8.1% U.S. average Worse than average
Scheduled flights
3,306in 12 months3 airlines
Most reliable airline
Delta Air Lines67.4% on time · 887 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 BOS to FLL, 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 67.4% 3.0% 12.5% 76 min 0.3% 887
2. JetBlue Airways 63.7% 3.5% 12.5% 68 min 0.6% 1,971
3. Spirit Airlines 58.0% 6.5% 15.6% 82 min 0.0% 448

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 Boston (BOS) to Fort Lauderdale (FLL): 67.4% of its 887 scheduled flights arrived within 15 minutes of schedule, compared with 58.0% for Spirit Airlines.
  • 3.8% of flights on this route were cancelled (about 1 in 26), 1.9 points higher than the U.S. average of 1.9%.
  • 12.9% of flights, about 1 in 8, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 72 min.
  • Overall, 63.9% of flights on this route arrived on time, 11.7 points lower than the U.S. average of 75.6%.
  • Over the last 3 years, October was the most reliable month on this route (75.6% on time) and December the least reliable (58.8%).
  • Cancellations peaked in February, when 5.2% of flights were cancelled.
  • Flights scheduled to depart 6 am to 7 am were the most punctual (78.7% on time); flights scheduled to depart 5 pm to 6 pm were the least (42.2%).
  • In the other direction, Fort Lauderdale (FLL) to Boston (BOS), 64.3% of flights were on time and 3.7% were cancelled. Compare airlines FLL to BOS.

Best and worst months to fly BOS to FLL

Jan 61.4%
Feb 61.5%
Mar 65.9%
Apr 74.6%
May 71.7%
Jun 71.5%
Jul 64.0%
Aug 66.8%
Sep 64.4%
Oct 75.6%
Nov 74.8%
Dec 58.8%
Share of scheduled flights on time 12-month average 63.9%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 61.4% 887
February 61.5% 976
March 65.9% 1,063
April 74.6% 985
May 71.7% 672
June 71.5% 625
July 64.0% 653
August 66.8% 659
September 64.4% 703
October 75.6% 765
November 74.8% 831
December 58.8% 990
Best and worst calendar month by airline, September 2023 to August 2026.
AirlineBest monthWorst month
Delta Air Lines November (80.6%) January (63.6%)
JetBlue Airways April (75.9%) December (54.5%)
Spirit Airlines October (80.2%) December (59.9%)

Month by month, last 12 months

Sep 63.4%
Oct 76.0%
Nov 67.7%
Dec 51.9%
Jan 53.8%
Feb 52.8%
Mar 64.4%
Apr 68.1%
May 74.8%
Jun 75.4%
Jul 64.6%
Aug 70.6%
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 63.4% 232
Oct 2025 76.0% 250
Nov 2025 67.7% 294
Dec 2025 51.9% 366
Jan 2026 53.8% 303
Feb 2026 52.8% 343
Mar 2026 64.4% 390
Apr 2026 68.1% 367
May 2026 74.8% 206
Jun 2026 75.4% 179
Jul 2026 64.6% 189
Aug 2026 70.6% 187

Best and worst departure times

<6a 75.3%
6a 78.7%
7a 75.5%
8a 76.1%
9a 70.9%
10a 67.1%
11a 60.0%
12p 58.2%
1p 56.7%
2p 57.1%
3p 62.2%
4p 54.2%
5p 42.2%
6p 44.6%
7p 55.2%
8p 55.8%
9p Insufficient sample
10p Insufficient sample
Share of scheduled flights on time
By scheduled local departure hour at BOS, 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 75.3% 231
Departing 6 am to 7 am 78.7% 385
Departing 7 am to 8 am 75.5% 458
Departing 8 am to 9 am 76.1% 180
Departing 9 am to 10 am 70.9% 86
Departing 10 am to 11 am 67.1% 146
Departing 11 am to noon 60.0% 135
Departing noon to 1 pm 58.2% 134
Departing 1 pm to 2 pm 56.7% 67
Departing 2 pm to 3 pm 57.1% 77
Departing 3 pm to 4 pm 62.2% 362
Departing 4 pm to 5 pm 54.2% 214
Departing 5 pm to 6 pm 42.2% 173
Departing 6 pm to 7 pm 44.6% 193
Departing 7 pm to 8 pm 55.2% 270
Departing 8 pm to 9 pm 55.8% 154
Departing 9 pm to 10 pm Insufficient sample 40
Departing 10 pm to 11 pm Insufficient sample 1
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 Boston, MA (BOS) to Fort Lauderdale, FL (FLL), 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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