F91378Frontier Airlines · MIA → SJU
live · 39m ago
Route confirmed Frontier Airlines

F91378 MiamiMIA · 19:55 San JuanSJU · 23:38

F91378 by Frontier Airlines flies from Miami (MIA) to San Juan (SJU) for the Tue, Nov 3 departure.

Right nowAwaiting arrival in San Juan · off blocks 20:23 · 28 min late
23:30

estimated arrival at SJU · local time · past this estimate · waiting on the board

En routeF91378 · position estimated
MIAMiamiSJUSan Juan
Estimated from the boardsarr 23:30

Board estimate · gate and arrival times. Off blocks 20:23.

Typical gate push+28 minmedian posted departure
Typical arrival−8 minmedian over 5 operations
Wins back in air~36 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 5 operations · gate push → arrival
0+30+60+90 min
11-04
+28 gate · −8 arrival
11-03
+28 gate · −8 arrival
11-02
+18 gate · −15 arrival
11-01
+36 gate · +8 arrival
10-31
+23 gate · −13 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −8 min · 0 cancelled · 5 operations tracked

The route today

live boards
MIAMiamiHigh riskMIA delay board →
SJUSan JuanOn-time likelySJU delay board →
MIA→SJUevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
44%Chance of 15+ min delay
1.9%Chance of cancellation
+24 minTypical airport delay in this weather

Conditions at MIA and SJU are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at Miami

Forecast

Thu 5 Nov, local date

High30°Clikely 29°C to 31°C
Low24°Clikely 23°C to 25°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at San Juan

Forecast

Thu 5 Nov, local date

High31°Clikely 30°C to 32°C
Low26°Clikely 25°C to 26°C
  • 37% chance of thunder
  • 81% chance of rain

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Miami to San Juan flights today

same route · Frontier Airlines
F92284departs 08:10
F93378departs 23:29

If F91378 is cancelled, these are the other Frontier Airlines nonstop flights from Miami to San Juan on the same day, with scheduled departure times in MIA local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How F91378 actually runs

Pro Flight Search has tracked every published board update for F91378 across the MIA and SJU boards: schedule changes, gate pushes and actual clocks. Usually lands ~9 min early. Based on 3 confirmed landings · 3/3 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how F91378 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
11-04MIA 19:55 20:23 (+28)SJU 23:38 23:30 (−8)
11-03MIA 19:55 20:23 (+28)SJU 23:38 23:30 (−8)
11-02MIA 19:55 20:13 (+18)SJU 23:38 23:23 (−15)
11-01MIA 19:55 20:31 (+36)SJU 23:38 23:46 (+8)
10-31MIA 20:55 21:18 (+23)SJU 23:39 23:26 (−13)

Aircraft

Recent tails: N676FR, N603FR, N663FR.

Board clocks recorded as MIA and SJU published them.

Planning around F91378? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: F91378 Miami to San Juan on-time performance, measured from the MIA and SJU airport boards.

Canonical URL
https://proflightsearch.com/flight/F91378
How we measure this →