SOF → FRASofia to Frankfurt am Main

live

Direct flights from Sofia (SOF) to Frankfurt am Main (FRA): 10 nonstop departures observed each week across 2 airlines. The median arrival is on schedule. No cancellations were recorded across the 4 tracked flights. The nonstop covers 1,397 km, an estimated 2 hours 17 minutes in the air. Measured by Pro Flight Search from live flight boards at Sofia and Frankfurt am Main. Updated 10 September 2026 at 04:09 UTC.

SOF Sofia smooth · +0
FRA Frankfurt am Main smooth · +0
1,397 km · ~2h 17m est.
dep bank 06:20–19:0010x weekly
Running clean · 2 airlines · 10x weekly · nonstop
100 / 100

route health from live SOF and FRA delay boards

Median arrival delay is −1 min. 0 of 4 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−1 minacross the last 4 operated legs
Flight time~2h 17mestimated from route distance
Weekly departures10x2 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Lufthansa

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
FB

Flights FB437 varies Mo We Fr

LufthansaLH

Flights LH1431 06:20 daily · LH1427 varies daily · LH1429 varies Mo Tu We Th Fr

History

operated legs · board outcomes
09-10LH1431dep +0 → arr−14
09-09FB437arrived−1
09-09LH1427arrived+8
09-09LH1429arrived−8

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SOFSofia +0 min smooth 🌤 clear · E 6 kt Full SOF delay board →
FRAFrankfurt am Main +0 min smooth 🌤 clear · S 4 kt Full FRA delay board →

Weather lens

Current conditions put the pressure at SOF and FRA: 33% odds of a 15+ minute delay and around +4 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Sofia to Frankfurt am Main route actually runs

Pro Flight Search records official board updates for nonstop SOF to FRA flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · 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 — Sofia (SOF) to Frankfurt am Main (FRA) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/SOF-FRA
How we measure this →

SOF to FRA questions

Is SOF–FRA running on time right now?

Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from SOF to FRA?

Great-circle distance is 1,397 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 129–150 min gate-to-gate on this route.

How often does SOF–FRA fly?

2 carriers operate this route, around 22 flights a week between them. Compare carrier days and times in the airline list above.

What does the route health score measure?

A blend of departure-side delay at SOF and arrival-side delay at FRA, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.