Talk

Jet2 have rip off exchange rates they are making money on the spread.

The exchange rate varies from place to place. When I was at the airport in Paris last year I had worked put I was better paying in euros than sterling when given the choice because the exchange rate was better.

Probably nothing more than them not using the best exchange rate out there.

The exchange rate they've used will be somewhere in your terms & conditions, or in your booking somewhere, possibly in the smallest of print in the most obscure of places ..... but it will be there .... and they'll likely say "you agreed to it" unfortunately.

Too late now but could you have paid in euros? Was it a flight booking or something else?

Yes a flight booking. I could have paid in euros. Kicking myself. With the extra charges (2 bags and 3 seats) I didn't twig that the bill was higher than it should have been. Lesson learned.

Offers to pay in your own currency are a licence to print money as the exchange rate can be anything. Watch for it on holiday too.