Every holiday season, the same headlines appear: "Flight delays hit record highs," "Airports descend into chaos," "Travelers stranded." And every year, travelers make the same mistake: they blame the weather, the crowds, or just bad luck. But the data tells a different story. Your odds of getting home on time vary dramatically based on which airline you book and which airport you fly through.
I spent the last month analyzing DOT data from 2024 and early 2025, and the results are more stark than I expected. Some airlines are genuinely trying. Others seem to have given up entirely.
The Airlines You Should Avoid This Holiday Season
Frontier Airlines is the worst major carrier in America right now. This is not opinion. With an on-time arrival rate of just 68.8% through mid-2025, nearly one in three Frontier flights arrives late. During the worst month (June 2025), that number dropped to 59.5%. More than four out of ten flights delayed.
Airline Performance Rankings (2024-2025)
| Airline | On-Time Rate | Complaints per 100k | Verdict |
|---|---|---|---|
| Delta Air Lines | 83.2% | 4.1 | Best Choice |
| Southwest Airlines | 79.8% | 1.5 | Excellent |
| Alaska Airlines | 78.4% | 2.6 | Good |
| United Airlines | 76.1% | 5.2 | Average |
| American Airlines | 72.4% | 6.8 | Below Average |
| JetBlue Airways | 72.6% | 10.4 | Avoid |
| Spirit Airlines | 71.2% | 12.8 | Avoid |
| Frontier Airlines | 68.8% | 23.3 | Worst |
The complaint data is even more damning. Frontier logged 23.3 complaints per 100,000 passengers in 2024, more than double the next worst airline. That is not a gap you can explain away with bad weather or air traffic control. That is a systemic problem.
Spirit Airlines deserves special mention. They are second-worst in complaints (12.8 per 100k) and their on-time numbers are mediocre. But here is the thing: Spirit passengers generally know what they are getting into. The ultra-low fares come with ultra-low expectations. Frontier somehow manages to be worse while charging similar prices.
The Airlines That Actually Perform
Delta Air Lines is the clear winner for holiday reliability. They recorded the lowest percentage of cancelled or delayed flights during the 2024 holiday period among major carriers. This is not new. Delta has consistently invested in operations, crew scheduling, and weather contingency planning in ways their competitors have not matched.
Southwest and Alaska Airlines are close behind, with Southwest posting the best complaint ratio in the industry. The difference between flying Southwest and flying Frontier is not just about delays. It is about how the airline treats you when things go wrong.
The Airports Where Delays Pile Up
Some airports are delay factories, and they tend to be the big hub airports you cannot easily avoid.
Worst Airports for Holiday Travel (2024-2025)
| Airport | Delay Rate | Primary Issue |
|---|---|---|
| Newark (EWR) | 26.4% | Congestion, weather, aging infrastructure |
| San Francisco (SFO) | 37.2% | Fog, single runway pair configuration |
| Dallas Fort Worth (DFW) | Most delays by volume | American hub, weather, traffic volume |
| LaGuardia (LGA) | 24.1% | Space constraints, NY airspace |
| JFK (JFK) | 22.8% | International traffic, weather |
Dallas Fort Worth (DFW) had the most total flight delays of any US airport through mid-2025, and held the same dubious distinction in 2024. The combination of American's hub operations, unpredictable Texas weather, and sheer traffic volume creates a perfect storm for delays.
San Francisco (SFO) had the highest percentage of delayed flights in early 2024, with 37.18% of departures running late. The famous fog is real, but the airport's single-runway-pair configuration is the bigger problem. When conditions deteriorate, SFO has no backup options.
2024 Holiday Season: By the Numbers
December 2024 saw a 78% on-time arrival rate, down from 84.9% in November. That seven-point drop represents the holiday travel crunch in action. But if you fly Delta (better than average) through a less congested airport (not DFW, EWR, or SFO), your actual odds are significantly better than 78%. Conversely, if you book Frontier through Newark, you might be looking at 60% odds or worse.
Perhaps most alarming: 2024 saw 437 tarmac delays of more than three hours on domestic flights, the most since tracking began in 2010. When things go wrong now, they go very wrong.
My Recommendations
Holiday Travel Checklist
- Book Delta or Southwest even if they cost $50-100 more. The on-time performance and customer service are worth it.
- Avoid Frontier entirely for holiday travel. The savings are not worth the risk. If Frontier is your only option, have a backup plan ready.
- Choose your connecting airport carefully. Salt Lake City, Denver (despite its size), and Phoenix tend to perform better than coastal airports.
- Build in buffer days. Do not book the last flight that could possibly get you there on time. The 78% on-time rate means one in five flights is late. Plan for that reality. (See also: Best and Worst Days to Fly for Christmas 2025)
The airlines and airports that perform well did not get there by accident. They invested in reliability when their competitors were cutting costs. You can reward that investment with your booking choices, and you will probably have a better holiday because of it.
Written by
Jim
Contributing writer for Airport Overview.
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