Airlines with most and fewest flight delays in 2025

Dec 19 2025 Travel trends

Air travel in 2025 has been a mixed bag. Some airlines ran tight, disciplined operations with minimal disruption, while others struggled with chronic delays despite low cancellation rates. Here’s a clear, fact-driven breakdown based on verified punctuality and reliability data published by aviation analytics groups, transport regulators, and airline performance reports throughout 2025.

The airlines with the fewest cancellations and delays

SAS (Scandinavian Airlines)

SAS continued to dominate European punctuality charts in 2025. Its on time performance reached 84.78 percent in October 2025, placing it at the top among Europe’s major carriers. Its cancellation rate stayed around 1.24 percent during the same period.

Finnair

Finnair held an on time performance of 83.51 percent, keeping delays low even during high traffic summer months. Its cancellation rate was 1.58 percent, one of the lowest among European legacy carriers.

Aer Lingus

Aer Lingus delivered an on time performance of 81.68 percent, outperforming many larger European airlines. Its cancellation rate remained relatively modest at around 2.12 percent.

Southwest Airlines

Southwest had one of the strongest reliability records in the United States. Its cancellation rate for 2024 was 0.62 percent, the lowest among major American carriers. In February 2025 it posted an 82.27 percent on time performance with a completion factor of 99.56 percent.

Delta Air Lines

Delta remained the most consistently punctual major airline in the United States. Its tracked flights achieved 83.46 percent on time performance for 2024, and it maintained low cancellation rates heading into 2025, supported by strong operational discipline.

The airlines with the most delays or operational disruptions

TAP Air Portugal

TAP had the highest delay rate in Europe among the 20 busiest airlines in early 2025. From January to May, 37.1 percent of flights were delayed by 15 minutes or more. However, TAP also had one of the lowest cancellation rates in Europe at around 0.05 percent.

Air France

Air France logged over 22 percent of flights delayed by 15 minutes or more in early 2025. Cancellations stayed under 1 percent, but the volume of delays made punctuality unreliable for tight schedules.

Swiss International Air Lines

Swiss posted 22.4 percent delays during the first half of 2025 along with a 1.29 percent cancellation rate. Although its overall service quality remained high, operational punctuality lagged behind competitors such as Finnair or SAS.

Ryanair

Ryanair operated one of Europe’s largest flight networks in 2025, and the sheer size of its schedule naturally came with occasional delays. Despite maintaining relatively low cancellation rates, the combination of quick turnarounds, a busy route map, and frequent airport congestion sometimes created minor operational slowdowns. For many passengers, late departures were simply a byproduct of the airline’s high-volume, fast-paced operations rather than any unusual service issues.

easyJet

easyJet also ran a very high volume of flights across major European hubs in 2025, which increased the overall probability of delays. While the airline maintained a low cancellation rate, heavy traffic at airports like London Gatwick and Amsterdam Schiphol, along with tight scheduling, contributed to frequent operational bottlenecks. Travelers experienced more delays not because easyJet performed poorly, but because high traffic environments made punctuality harder to maintain.

What travelers should take away

If your priority is getting there on time, airlines such as SAS, Finnair, and Aer Lingus remain standouts in Europe. In the United States, Southwest and Delta continue to set the standard for reliability, balancing punctuality with low cancellation rates.

There is one important insight: a low cancellation rate does not always reflect how smoothly an airline operates day to day. TAP Portugal, for example, maintains one of the lowest cancellation rates in Europe, but like many airlines with complex networks and busy hubs, it can still experience timing setbacks during high-traffic periods. This shows that “not cancelled” and “perfectly on time” are two different metrics.

When booking in 2025, cross check all three factors:

On Time Performance

Cancellation Rate

Flight Volume, because airlines with massive networks statistically face more disruption

These combined metrics give you the most accurate picture of what to expect on travel day. MYFLYRIGHT relies exclusively on verified operational records and established legal sources, not guesswork or blog-level statistics. All our analyses are grounded in data from authoritative aviation bodies such as Eurocontrol, OAG, Cirium, and national aviation authorities, as well as official EC261 case law. This ensures that every claim, comparison, and performance insight we publish reflects documented reality. We do not speculate; we base our assessments on hard data proven through legal standards and industry-recognized reporting.

How MYFLYRIGHT can help

When a delay or cancellation ruins your plans, you should not have to fight the airline alone. MYFLYRIGHT helps passengers claim compensation for disrupted flights under EU Regulation 261 and other global passenger rights frameworks. The platform tracks flight data, compares it with official disruption records, and handles the full claim process from start to finish. If your airline caused a delay, cancellation, missed connection, or overbooking, MYFLYRIGHT can review your case, confirm eligibility, and pursue compensation on your behalf. You get support from experts who know airline obligations inside out, and you only pay if the claim succeeds. This takes the stress and paperwork off your plate so you can focus on your trip instead of chasing refunds or arguing with customer service.