Which airline is most reliable for DTW (Detroit) to SJU (San Juan)?

The most reliable airline on the DTW to SJU route is Spirit Airlines, with an on-time arrival rate of 85%.

How often are flights delayed from DTW to SJU?

About 19% of flights from DTW to SJU experience delays. 81% arrive on time.

What's the average delay on DTW to SJU flights?

When flights from DTW to SJU are delayed, the average delay is approximately 49 minutes.

Is a short connection safe after a DTW to SJU flight?

With 81% of DTW to SJU flights arriving on time and an average delay of 49 minutes when late, a connection under 60 minutes at SJU is risky. We recommend at least 75-90 minutes for domestic connections after this route.

DTW → SJU

DTW (Detroit) to SJU (San Juan)

DTW (Detroit) to SJU (San Juan) flights arrive on time 81% of the time. The most reliable airline on this route is Spirit Airlines at 85%. The average delay is 49 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated October 2026.

DTW → SJU on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

This route is on time most of the time. About 81% of flights arrive on schedule.

Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Accurate?

Spirit Airlines is significantly more reliable on this route at 85% on time vs Frontier Airlines at 47%.

Airline Comparison

Spirit Airlines leads at 85% on time; Frontier Airlines trails at 47%.

Accurate?

Good to know

Departing from DTW

81% on time

Expect ~18 min sitting on the taxiway after your gate pushes back. DTW has long runway queues.

TSA is currently ~8 min. Best time: 4 AM (about 5 min).

More about DTW →

Arriving at SJU

75% on time

When flights into SJU are late, the average delay is 76 minutes. Build buffer if you have ground plans.

If connecting at SJU: TSA is ~15 min right now. Allow at least 60 minutes for a domestic connection.

More about SJU →Connection times at SJU →

Flight cancelled or delayed?

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DTW Airport SJU Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.