Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4122
SCHEDULED · TYPICAL SCHEDULE
Tomorrow
WN 4122 · MDW → PHL
departs 7:35 AM CT · arrives 10:35 AM ET
Forecast issued Thu 12:00 PM ET · 21h before departure
Odds over time
Arrive at PHL more than 15 minutes late?
7%
chance · ±1 pts
−1 pt · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
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How late will it get to PHL?
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On time or early
92%
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15–30 min late
2%
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30 min–1 hour late
3%
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1–2 hours late
1%
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Over 2 hours late
<1%
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Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.