Cheap flights from Belfast to Sofia

October stands as the cheapest month for travel on this route according to available fare data. You can also find prices listed for November, December, February, March and May if those periods suit your plans better. School holidays in the UK and around Christmas tend to push demand up, so booking well ahead during those windows helps secure better fares regardless of whether you prefer spring or winter travel.

All options on this route involve at least one connection rather than a non-stop service. KLM Royal Dutch Airlines routes passengers through Amsterdam while British Airways and BA CityFlyer generally connect via London hubs. Aer Lingus offers another connection possibility from Belfast, and Easyjet provides budget-friendly alternatives though also requiring transfers before reaching Sofia Airport.

Arriving at Sofia Airport late in the day means you should consider how transport options may be reduced compared to peak hours. The airport sits outside the city centre with regular bus services running into town throughout most of the day and evening. Taxis are available but prices vary, so having some local currency ready helps before heading toward your accommodation.

Currency

EUR (€)

Power sockets

Type C, F · 230 V

Language

Bulgarian

Emergency number

112

Driving side

right

Calling code

+359

Internet domain

.bg, .бг

EU / Schengen

EU member, Schengen area

Population of Sofia

1.2 M (2025)

Time zone

UTC+02 (Europe/Sofia)

Country facts: Wikidata

• Verify that your passport meets entry requirements for Bulgaria before purchasing any tickets.
• Confirm whether baggage allowances apply differently on connecting segments when booking separate tickets.
• Check which airlines operate each leg of your journey since carriers may differ between departure and arrival connections.
• Compare prices across the listed months rather than locking into a single date without seeing alternatives.
• Ensure you understand connection times since tight transfers in London or Amsterdam leave little margin for delays.