Flights were grounded at Manchester Airport on Sunday due to a problem with re-fuelling aircraft.
Some passengers were forced to spend hours stuck on the runway as engineers try to fix the problem.
Several flights were diverted to Liverpool to get fuel there.
Manchester Airport said this morning that the power issue that affected the fuel supply had now been fixed but it warned there could be further delays and cancellations today.
Passengers are being urged to check with their airline for information and updates.
"We apologise for any inconvenience caused and thank you for your patience," it added.
Nearly 90 flights were cancelled.
Jet2, easyJet, Thomas Cook and Flybe flights were among those affected.
