Which US airline has the best on-time record in 2026?

Delta leads at 81.8 percent on-time (18.2 percent delayed) for the fourth consecutive year. United follows at 79.9 percent and Alaska at 79.6 percent.

Which US airline is most delayed?

JetBlue at 31.4 percent of arrivals delayed 15+ minutes, followed by Frontier at 29.7 percent and Sun Country at 28.0 percent. JFK/BOS operations weigh on JetBlue.

Does a delay over 15 minutes trigger DOT refund?

No. BTS measures delays at 15+ minutes, but DOT refund requires 3+ hours for domestic flights or 6+ hours international.

Which delay causes qualify for DOT refund?

Any 3+ hour domestic or 6+ hour international delay qualifies for a refund regardless of cause under the DOT 2024 rule. Cause only affects compensation beyond refund.

Why is JetBlue's delay rate so much higher?

Hub operations at JFK/BOS expose JetBlue to NY-area weather and congestion. The fleet mix also concentrates on shorter routes where any disruption ripples further.

Are weather delays airline-controllable?

No. Weather, ATC, and security are not controllable. But carriers over-claim weather when crew or mechanical is the real cause. Push back on extraordinary defenses.

How do I prove my delay was airline-controllable?

Cross-reference the airline's reason with METAR weather data, FAA airport status, and FlightAware operational logs. If the airport was normal but your flight was late, it's likely controllable.

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Compensation TipsApril 21, 2026•7 min read

2026 US Airline Delay Rankings

US airline delay rates in 2026 YTD range from Delta's 18.2 percent to JetBlue's 31.4 percent. Here is the BTS data, the contributing causes, and how delay rate maps to DOT refund exposure.

The 2026 Delay Rate Leaderboard

2026 US airline delay rankings (BTS YTD through March, percent of arrivals delayed 15+ minutes):

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Delta Air Lines: 18.2 percent delayed.
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United Airlines: 20.1 percent.
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Alaska Airlines: 20.4 percent.
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Southwest: 21.8 percent.
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Hawaiian: 22.5 percent.
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American Airlines: 23.2 percent.
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Allegiant: 25.9 percent.
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Spirit: 27.3 percent.
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Sun Country: 28.0 percent.
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Frontier: 29.7 percent.
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JetBlue: 31.4 percent.

Delta leads for the fourth consecutive year. ATL hub operations and operational discipline explain the gap.

What Counts as Delayed

BTS defines delay as arrival 15+ minutes late. DOT refund threshold is 3+ hours domestic, 6+ hours international. Most BTS delays do not trigger refunds. But a carrier with higher overall delay rate has proportionately more DOT-refund-eligible disruptions.

Contributing Causes (2026 YTD)

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Late aircraft (cascading): 34 percent.
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Carrier-controllable: 22 percent.
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Weather: 25 percent.
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National Aviation System (NAS): 17 percent.
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Security / other: 2 percent.

Carrier-controllable is the DOT-refund-relevant bucket. JetBlue's and Frontier's controllable delay rates run 25+ percent, making claims from those carriers meaningful.

How Delay Rate Maps to Refund Exposure

If we assume 12 percent of delayed flights cross the 3-hour threshold, airline DOT-refund exposure (as percent of total arrivals):

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Delta: ~2.2 percent of arrivals eligible.
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United: ~2.4 percent.
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American: ~2.8 percent.
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Southwest: ~2.6 percent.
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JetBlue: ~3.8 percent.
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Frontier: ~3.6 percent.
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Spirit: ~3.3 percent.

A 3.8 percent exposure rate translates to roughly 1 in 26 JetBlue flights being refund-eligible. Claim volume at that level is material.

Hub vs Non-Hub Performance

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Delta ATL hub: 83 percent on-time.
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American DFW hub: 78 percent.
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United ORD hub: 76 percent.
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Southwest DAL/BWI: 79 percent.
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JetBlue JFK hub: 66 percent.
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Alaska SEA hub: 80 percent.

Related Rankings Data

See airline rankings and comparison summer 2026 edition, which airline pays compensation fastest, and airline rankings and comparison christmas edition for seasonal variation.

Pillar Link and Authority Sources

For the pillar see Airline Rankings and Comparison. For primary data see BTS Airline On-Time Performance and DOT Air Travel Consumer Reports.

TravelStacks files DOT refund claims for delay disruptions at $19 flat. Start a claim in 30 seconds.

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