Route guide

London to Sofia (STN-SOF): Nonstop Upgrade & Award Space

Ryanair and Royal Khmer Airlines fly nonstop between London (STN) and Sofia (SOF), roughly 15 times a week. Because so many carriers compete on this route, premium seats turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every STN to SOF departure, so you know which flights have space before you book.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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15
Nonstop flights a week
1,250 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every STN to SOF departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for London to Sofia to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each STN to SOF departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See STN to SOF on the interactive route map, with schedules, connections, and route statistics.

Airlines flying London to Sofia nonstop

Carriers operating STN to SOF nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • Ryanair
  • Royal Khmer Airlines
See STN to SOF on the interactive map →

Frequently asked questions about STN to SOF

How far is Sofia from London?
STN to SOF covers about 1,250 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from STN to SOF?
Ryanair and Royal Khmer Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on both of them.
How many flights a week are there from STN to SOF?
About 15 nonstop flights a week run between London and Sofia in the current schedule, operated by Ryanair and Royal Khmer Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on STN to SOF?
Open the STN to SOF calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the London to Sofia route, and 2LNR will notify you when space opens. It's free to start.

Never miss STN to SOF upgrade or award space

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