Which has the bigger carry-on allowance, British Airways or Finnair?

British Airways: 56 × 45 × 25 cm (22 × 17.7 × 9.8 in), up to 23 kg (50.7 lb). Finnair: 55 × 40 × 23 cm (21.7 × 15.7 × 9.1 in), up to 8 kg (17.6 lb). British Airways allows the larger bag.

Where do British Airways and Finnair fly from?

British Airways's main hubs are London (LHR), London Gatwick (LGW). Finnair's are HEL. The better pick is often whichever flies nonstop from your airport.

Are British Airways and Finnair partners?

Yes. Both belong to oneworld, so you can usually earn miles and use elite benefits across the two.

BA vs AY · 2026 comparison

British Airways vs Finnair

Q: Do British Airways and Finnair include a carry-on on basic economy?

British Airways: Even hand-baggage-only fares include a cabin bag and a handbag. Finnair: Superlight, Finnair's cheapest fare on European routes, includes only a small under-seat bag. Light and higher fares, and every long-haul fare, include an 8 kg carry-on. Finnair Plus tier members get a carry-on on Superlight too.

British Airways wins on a bigger carry-on, a carry-on on its cheapest fare and a more generous carry-on weight limit; Finnair doesn't clearly win any category. Here's how they compare on bags, fees, comfort, reliability and loyalty.

Verified Oct 17, 2026By Steven MoHow we check Report a correction

British Airways

Wins 3 categories

A bigger carry-on
A carry-on on its cheapest fare
A more generous carry-on weight limit

Finnair

No clear category wins

Quick verdict

British Airways wins on a bigger carry-on, a carry-on on its cheapest fare and a more generous carry-on weight limit; Finnair doesn't clearly win any category. Check the cheapest fare's bag rules before you compare prices.

Carry-on size: British Airways: 56 × 45 × 25 cm · Finnair: 55 × 40 × 23 cm
Carry-on on the cheapest fare: British Airways: Included on every fare · Finnair: Not on some basic fares

Side by side

	British Airways	Finnair
Bags
Carry-on size	56 × 45 × 25 cm	55 × 40 × 23 cm
Carry-on on the cheapest fare	Included on every fare	Not on some basic fares
Carry-on weight limit	23 kg (50.7 lb)	8 kg (17.6 lb)
Personal item	40 × 30 × 15 cm	40 × 30 × 15 cm
Network
Alliance	oneworld	oneworld
Loyalty program	British Airways Club	Finnair Plus
Main hubs	LHR, LGW	HEL

Highlighted values are better for travelers. Fees are for U.S. domestic economy flights; on-time data is 2025 U.S. DOT figures for each airline's own flights.

Bags and fees

British Airways allows a carry-on up to 56 × 45 × 25 cm (22 × 17.7 × 9.8 in), and Finnair up to 55 × 40 × 23 cm (21.7 × 15.7 × 9.1 in), so British Airways's is roomier.

British Airways includes it on every fare, while Finnair's Superlight can be personal-item only.

Carry-on weight limits: 23 kg (50.7 lb) on British Airways, 8 kg (17.6 lb) on Finnair.

Personal items: 40 × 30 × 15 cm (15.7 × 11.8 × 5.9 in) on British Airways, and 40 × 30 × 15 cm (15.7 × 11.8 × 5.9 in) on Finnair.

Basic economy

British Airways (Basic (hand baggage only)): Even hand-baggage-only fares include a cabin bag and a handbag.

Finnair (Superlight): Superlight, Finnair's cheapest fare on European routes, includes only a small under-seat bag. Light and higher fares, and every long-haul fare, include an 8 kg carry-on. Finnair Plus tier members get a carry-on on Superlight too.

Loyalty and where they fly

Both are oneworld members, so status and miles can work across the two.

Loyalty programs: British Airways Club (British Airways) and Finnair Plus (Finnair).

British Airways's main hubs are London (LHR), London Gatwick (LGW). Finnair's are HEL. The best choice often comes down to which airline flies nonstop from your airport.

Which should you book?

Choose British Airways if you want…

a bigger carry-on
a carry-on on its cheapest fare
a more generous carry-on weight limit
to earn and use oneworld miles and status
nonstops from LHR, LGW

Choose Finnair if you want…

to earn and use oneworld miles and status
nonstops from HEL

On a route both fly, the cheaper ticket isn't always the cheaper trip: add the bags you'll actually bring, and check the fare rules before you book.