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Thanksgiving & Christmas Flight Delays at MIA: Miami International Airport

Over the last four Thanksgiving travel weeks (2022–2025, Tuesday before through Sunday after), 22.7% of flights that left Miami International Airport (Miami, FL) arrived at least 15 minutes late and 0.3% were cancelled. In the rest of November the same airport had 18.3% late and 0.9% cancelled, so Thanksgiving week had 4.4 points more late arrivals. The best day was Thanksgiving Day (9.9% late); the worst was Sun after (40.1% late).

22.7%late arrivals, Thanksgiving week

0.3%cancelled, Thanksgiving week

29.4%late arrivals, Dec 20–31

1.9%cancelled, Dec 20–31

Which day of Thanksgiving week is best at MIA?

Day	Flights (4 yrs)	Late (15+ min)	Cancelled	Avg dep. delay (min)
Tue before	1,217	16.5%	0.2%	12.7
Wed before	1,225	29.7%	0.1%	20.5
Thanksgiving Day	769	9.9%	0.1%	6.3
Fri after	1,162	14.5%	0.3%	11.1
Sat after	1,305	19.8%	0.7%	14.6
Sun after	1,274	40.1%	0.2%	23.1

Pooled over 2022–2025. Thanksgiving 2026 is Thursday, Nov 26, so the window is Tue Nov 24 – Sun Nov 29. Individual days have fewer flights, so small differences are noise.

Year by year at MIA

Year	Thanksgiving week late	Thanksgiving week cancelled	Rest of Nov. late	Dec 20–31 late	Dec 20–31 cancelled
2022	21.7%	0.1%	20.6%	30.8%	5.5%
2023	17.2%	0.0%	17.8%	28.1%	0.1%
2024	21.0%	0.1%	14.0%	33.0%	0.9%
2025	30.5%	0.9%	21.1%	26.2%	1.9%

Single years can be dominated by one storm or airline meltdown; look at the range, not just the average. Dec 20–31, 2022 includes the late-December 2022 winter storm and airline disruptions nationwide.

Christmas week (Dec 20–31) at MIA

Across 2022–2025, 29.4% of flights from MIA arrived 15+ minutes late and 1.9% were cancelled during Dec 20–31, compared with 21.9% late and 0.3% cancelled from Dec 1–19 (+7.5 pts late arrivals).

Airlines at MIA, Thanksgiving week

Airline (flights it operated)	Flights (4 yrs)	Late	Cancelled	Dec 20–31 late
American Airlines	3,637	25.0%	0.2%	28.5%
Envoy Air *	933	15.2%	0.3%	22.9%
Delta Air Lines	659	18.7%	0.0%	31.8%
United Airlines	412	21.5%	0.5%	28.4%
Spirit	390	25.3%	0.5%	34.9%
Southwest	385	19.6%	0.3%	37.6%
Frontier	277	26.2%	0.7%	35.3%

* Regional airline that mostly flies under another airline’s brand (for example American Eagle, Delta Connection, United Express), so the ticket you bought may not match the operator. Airlines with fewer than 200 flights in the window are omitted.

Why flights from MIA were late (Thanksgiving week)

Cause category (BTS)	Share of delay minutes
Airline (crew, maintenance, cleaning…)	37.2%
Extreme weather	3.1%
National Aviation System (air traffic, volume)	20.0%
Security	0.3%
Late-arriving aircraft	39.3%

Share of reported delay minutes on flights that arrived 15+ minutes late. “Extreme weather” is only a narrow category; many weather-related delays are counted under National Aviation System or late-arriving aircraft. Categories are assigned by airlines to BTS rules.

Other airports nearby

Source: BTS Airline On-Time Performance data, flights departing MIA operated by airlines that report to BTS. “Late” = arrived 15 or more minutes after schedule (the DOT definition), counted among flights that were not cancelled or diverted. Computed by Holiday Delay Odds; see methodology.