How does KAYAK find flight deals under £100?

KAYAK aggregates deals from hundreds of travel providers to allow you to quickly and easily compare flight deals from United Kingdom that match your budget. Use the available filters to narrow down deals and find the right trip for you.

Is it easier to find one-way or return flight deals under £100?

Getting a flight under £100, either one-way or return, can hinge on a few things like your destination, the airline you choose, and when you buy the tickets. Return tickets used to be the standard, but nowadays, with budget airlines and more competition, that’s not always the best option. For domestic flights or short trips, you might find a better deal by looking for one-way tickets under £100. This is especially true if you’re flying with a budget-friendly airline. If you’re heading overseas or on a longer journey, return tickets under £100 usually provide better value for money. Another smart way to stick to a £100 budget is by booking two one-way tickets with two different airlines. This clever strategy is known as a ‘Hacker Fare’.

Are flights under £100 available with popular airlines?

Yes – deals on flights under £100 can often be found on KAYAK from popular airlines such as easyJet, Ryanair and Wizz Air. Deal availability does depend on several factors, including the specific flight route you’re interested in, departure dates, and booking period. Be sure to check back regularly as new deals are often being discovered by KAYAK users.

Are there deals on flights under £100 to domestic destinations?

Yes – KAYAK often has deals on flights under £100 departing and arriving within United Kingdom. Deals may vary depending on your preferred origin and arrival airports, as well as the day of the week and time of year, so be sure to check back soon if you’re not finding the flight deals you’re looking for.

Are there deals on flights under £100 to international destinations?

Yes – deals on flights under £100 arriving outside United Kingdom can often be found on KAYAK. As international travel can often cost a bit more than domestic, the types of flight deals may vary (one-way or return) depending on the flight route and time of year you’re looking to travel. Be sure to check back soon if you’re not finding the right international flight deal under your budget as deals are consistently being refreshed.

Flights Under £100

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Flight Deals

Latest Flights Under £100

Discover the best prices for you by selecting your travel dates on KAYAK.

Lisbon

Istanbul

Athens

Larnaca

Florence

Catania

All Deals

Cheap Flights Under £100 to Lisbon

Mon, 15 Jun - Thu, 18 Jun

17:50 - 20:40

BHX

LIS

2h 50mdirect

22:10 - 10:55

LIS

BHX

12h 45m

1 stop

£73Multiple Airlines

Sun, 5 Jul - Sun, 19 Jul

15:05 - 17:55

BHX

LIS

2h 50mdirect

19:30 - 22:10

LIS

BHX

2h 40mdirect

£75Ryanair

Sun, 3 May - Sun, 10 May

15:05 - 17:55

BHX

LIS

2h 50mdirect

19:30 - 22:10

LIS

BHX

2h 40mdirect

£77Ryanair

Wed, 13 May - Sun, 17 May

12:00 - 20:45

BHX

LIS

8h 45m

1 stop

19:30 - 22:10

LIS

BHX

2h 40mdirect

£79Ryanair

Tue, 19 May - Sun, 24 May

18:45 - 06:50

BHX

LIS

12h 05m

1 stop

19:30 - 22:10

LIS

BHX

2h 40mdirect

£80Ryanair

Tue, 19 May - Sun, 24 May

18:45 - 06:50

BHX

LIS

12h 05m

1 stop

19:30 - 22:10

LIS

BHX

2h 40mdirect

£82Ryanair

Tue, 12 May - Tue, 19 May

20:10 - 23:00

LGW

LIS

2h 50mdirect

06:10 - 08:50

LIS

LGW

2h 40mdirect

£83easyJet

Sun, 26 Apr - Wed, 29 Apr

07:35 - 10:30

LTN

LIS

2h 55mdirect

21:35 - 00:10

LIS

LTN

2h 35mdirect

£83easyJet

Mon, 11 May - Wed, 13 May

06:00 - 21:35

LGW

LIS

15h 35m

1 stop

05:55 - 12:40

LIS

LGW

6h 45m

1 stop

£83Multiple Airlines

Sat, 25 Apr - Wed, 6 May

18:10 - 21:00

LTN

LIS

2h 50mdirect

21:35 - 00:10

LIS

LTN

2h 35mdirect

£84easyJet

Useful Info

How does KAYAK find flight deals under £100?
KAYAK aggregates deals from hundreds of travel providers to allow you to quickly and easily compare flight deals from United Kingdom that match your budget. Use the available filters to narrow down deals and find the right trip for you.
Is it easier to find one-way or return flight deals under £100?
Getting a flight under £100, either one-way or return, can hinge on a few things like your destination, the airline you choose, and when you buy the tickets. Return tickets used to be the standard, but nowadays, with budget airlines and more competition, that’s not always the best option.

For domestic flights or short trips, you might find a better deal by looking for one-way tickets under £100. This is especially true if you’re flying with a budget-friendly airline. If you’re heading overseas or on a longer journey, return tickets under £100 usually provide better value for money. Another smart way to stick to a £100 budget is by booking two one-way tickets with two different airlines. This clever strategy is known as a ‘Hacker Fare’.
Are flights under £100 available with popular airlines?
Yes – deals on flights under £100 can often be found on KAYAK from popular airlines such as easyJet, Ryanair and Wizz Air. Deal availability does depend on several factors, including the specific flight route you’re interested in, departure dates, and booking period. Be sure to check back regularly as new deals are often being discovered by KAYAK users.
Are there deals on flights under £100 to domestic destinations?
Yes – KAYAK often has deals on flights under £100 departing and arriving within United Kingdom. Deals may vary depending on your preferred origin and arrival airports, as well as the day of the week and time of year, so be sure to check back soon if you’re not finding the flight deals you’re looking for.
Are there deals on flights under £100 to international destinations?
Yes – deals on flights under £100 arriving outside United Kingdom can often be found on KAYAK. As international travel can often cost a bit more than domestic, the types of flight deals may vary (one-way or return) depending on the flight route and time of year you’re looking to travel. Be sure to check back soon if you’re not finding the right international flight deal under your budget as deals are consistently being refreshed.

If you're aiming to snag flights under £100, be sure to look out for deals from Ryanair and Ryanair. These are the go-to choices for such budget-friendly flights among our KAYAK users.
For the optimal price on flights under £100, it's recommended to book your ticket at least a week before you plan to take off.
If you're looking to score flights under £100, January is your best bet. So, plan for a winter getaway if you're aiming for these budget-friendly fares.
The day you choose to fly can also play a part in finding desirable tickets under £100. According to all the flight bookings under £100 made on KAYAK in the past couple of weeks, Monday was the day to beat for the best deals.