| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jan 03 | BWI | SJU | 12:30 | 17:30 |
Cancelled
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| Claim > | ||||||
| Dec 27 | BWI | SJU | 16:00 | 20:29 |
Delayed
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Track > |
| Dec 20 | BWI | SJU | 13:14 | 17:40 |
Landed
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Track > |
| Nov 29 | BWI | SJU | 12:44 | 17:19 |
Landed
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Track > |
| Nov 22 | BWI | SJU | 12:52 | 17:51 |
Landed Late
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Track > |
Southwest Airlines Flight WN4278 connects Baltimore, United States to San Juan, Puerto Rico, taking off from Baltimore Washington International Airport BWI and landing at San Juan Luis Munoz Marin International Airport SJU.
How long is the WN4278 flight from Baltimore to San Juan?
The average flight time from Baltimore to San Juan is 3 hours and 37 minutes. The flight distance is 2524 km / 1569 miles and the average flight speed is 686 km/h / 426 mph.
What is the On-Time Performance (OTP) of Southwest Airlines Flight WN4278 Baltimore to San Juan?
The Airportia On-Time Performance Rating for Southwest Airlines Flight WN4278 is 4.3/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight WN4278 arriving at?
Flight WN4278 arrives at San Juan Luis Munoz Marin International Airport (SJU) Terminal B.
When was the latest WN4278 flight?
The latest flight was scheduled for Saturday, January 3rd, 2026 but was cancelled.
How else can the flight WN4278 be referenced as?
This Southwest Airlines flight can also be referenced as SWA4278, WN 4278, SWA 4278.
How often is flight WN4278 delayed?
On average, 60% of all WN4278 flights are delayed. The average delay is 70 minutes.
Can I get compensation for my delayed or cancelled WN4278 flight or baggage issues?
If your WN4278 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our WN4278 Flight Tracker above for more details.
Claim compensation for your flight delay or cancellation!
Flight delays happen, but that doesn’t mean you have to accept them. You may be entitled to as much as 600€ in compensation if your flight has been delayed, cancelled or overbooked within the last three years. Claim Compensation Now >
Other flights departing from Baltimore BWI: WN4351, WN1679, WN1963, WN2867
Other flights arriving at San Juan SJU: WN3612, NK553, WN4429, 9K8261
All flights connecting Baltimore BWI to San Juan SJU.