Free upgrades are often the best possible start to a holiday for a lucky few.
Often people get them if a mistake has been made on the airline or airport's part, and they tend to come as a great surprise.
However, according to one flight attendant says you can increase your chances of getting picked for a free upgrade by simply being nice to cabin crew, the Express reports.
Nassim explained that small but thoughtful gestures could make your cabin crew look to return the favour.
The experienced cabin crew member also had a few other tips to share on top of that.
She said: "I would definitely recommend being really nice to the crew and bringing snacks or treats is always a major plus."
However, Nassim warned it "depends on who is on the flight, to be honest".
"If the person who is in charge of the flight or the captain is quite strict we might not be able to upgrade regardless."
She continued: "If it’s a chilled crew they will try and do it.
"I used to always upgrade people who were really nice or brought us treats if it was possible.
"We will do anything for passengers who are nice to us but not put as much effort in for the ones who aren’t," she explained.
The flight attendant also shared a very useful money-saving hack for those who are travelling on a budget.
For those passengers who want to save money on holiday, Nassim recommended bringing their own food on the plane as the crew is able to assist with that.
The flight attendant explained if passengers bring their food in oven-proved containers, the crew will be able to warm it up in the ovens they have on the plane.
The crew can also provide cutlery and paper cups if necessary.
Nassim explained: "I would absolutely say bring your own food 100 percent!!
"Go and get snacks the night before.
"Don’t get anything at the airport it’s so expensive!"
However, the flight attendant pointed out that "buying stuff on the plane or at the airport is also part of the travelling experience so if you can splurge why not".
"But yes, for saving money I would absolutely say bring own snacks!!
"Saves so much money and you get so much more.
"Also the options we have onboard are limited.
"We can’t always guarantee everything will be in stock or that it will be enough for everyone," she explained.
Did you find these insider tips helpful? Let us know in the comments.
Don't miss the latest news from around Scotland and beyond - Sign up to our daily newsletter here .