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Cheap flights from London Heathrow Airport to Mariehamn from £157

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Mariehamn departing on 24/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from London Heathrow Airport to Mariehamn

Cheap return flights

Enter your travel dates to find the best prices.
Finnair Logo
07:30 - 22:05
LHR
-
MHQ
12h 35m
1 stop
Finnair Logo
16:30 - 20:40
MHQ
-
LHR
6h 10m
1 stop
£273Finnair
Tue, 28 Jul - Wed, 5 Aug
Finnair Logo
18:10 - 08:00
LHR
-
MHQ
11h 50m
1 stop
Finnair Logo
16:30 - 20:40
MHQ
-
LHR
6h 10m
1 stop
£292Finnair
Thu, 2 Jul - Wed, 8 Jul
Finnair Logo
10:20 - 21:50
LHR
-
MHQ
9h 30m
1 stop
Finnair Logo
22:00 - 09:10
MHQ
-
LHR
13h 10m
1 stop
£309Finnair
Mon, 4 May - Sun, 10 May
Finnair Logo
13:35 - 21:35
LHR
-
MHQ
6h 00m
1 stop
Finnair Logo
08:25 - 17:05
MHQ
-
LHR
10h 40m
1 stop
£314Finnair
Sun, 28 Jun - Fri, 3 Jul
Multiple Airlines Logo
06:40 - 16:45
LHR
-
MHQ
8h 05m
2 stops
Multiple Airlines Logo
17:10 - 21:20
MHQ
-
LHR
6h 10m
1 stop
£315Multiple Airlines
Wed, 13 May - Wed, 20 May
Multiple Airlines Logo
06:40 - 20:00
LHR
-
MHQ
11h 20m
1 stop
Multiple Airlines Logo
16:00 - 21:20
MHQ
-
LHR
7h 20m
1 stop
£328Multiple Airlines
Sun, 31 May - Sun, 7 Jun
Multiple Airlines Logo
13:55 - 21:35
LHR
-
MHQ
5h 40m
1 stop
Multiple Airlines Logo
17:10 - 21:20
MHQ
-
LHR
6h 10m
1 stop
£337Multiple Airlines
Wed, 13 May - Wed, 20 May
Multiple Airlines Logo
07:30 - 21:35
LHR
-
MHQ
12h 05m
2 stops
Multiple Airlines Logo
17:10 - 19:55
MHQ
-
LHR
4h 45m
1 stop
£354Multiple Airlines
Tue, 28 Jul - Wed, 5 Aug
Finnair Logo
07:30 - 09:45
LHR
-
MHQ
24h 15m
1 stop
Finnair Logo
22:00 - 20:40
MHQ
-
LHR
24h 40m
1 stop
£366Finnair
Thu, 17 Sep - Sun, 20 Sep
Multiple Airlines Logo
06:40 - 16:45
LHR
-
MHQ
8h 05m
2 stops
Multiple Airlines Logo
16:00 - 19:55
MHQ
-
LHR
5h 55m
1 stop
£369Multiple Airlines
Mon, 4 May - Sun, 10 May

Finnair flights from London Heathrow Airport to Mariehamn

Our best Finnair deals on London Heathrow Airport to Mariehamn flight tickets
Finnair
28 Jul
LHR07:30London Heathrow
12h 35m
1 stop
MHQ22:05Mariehamn
5 Aug
MHQ16:30Mariehamn
6h 10m
1 stop
LHR20:40London Heathrow
£273
Finnair
2 Jul
LHR18:10London Heathrow
11h 50m
1 stop
MHQ08:00Mariehamn
8 Jul
MHQ16:30Mariehamn
6h 10m
1 stop
LHR20:40London Heathrow
£292
Finnair
4 May
LHR10:20London Heathrow
9h 30m
1 stop
MHQ21:50Mariehamn
10 May
MHQ22:00Mariehamn
13h 10m
1 stop
LHR09:10London Heathrow
£309

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Mariehamn that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 18 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Mariehamn that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Tue 28/7

07:30-22:05

1 stop12h 35m

Mariehamn

Wed 5/8

16:30-20:40

1 stop6h 10m

£273

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Thu 2/7

18:10-08:00

1 stop11h 50m

Mariehamn

Wed 8/7

16:30-20:40

1 stop6h 10m

£292

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Mon 4/5

10:20-21:50

1 stop9h 30m

Mariehamn

Sun 10/5

22:00-09:10

1 stop13h 10m

£309

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Sun 28/6

13:35-21:35

1 stop6h 00m

Mariehamn

Fri 3/7

08:25-17:05

1 stop10h 40m

£314

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Wed 13/5

06:40-16:45

2 stops8h 05m

Mariehamn

Wed 20/5

17:10-21:20

1 stop6h 10m

£315

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Sun 31/5

06:40-20:00

1 stop11h 20m

Mariehamn

Sun 7/6

16:00-21:20

1 stop7h 20m

£328
Fastest return journey

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Wed 13/5

13:55-21:35

1 stop5h 40m

Mariehamn

Wed 20/5

17:10-21:20

1 stop6h 10m

£337

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Tue 28/7

07:30-21:35

2 stops12h 05m

Mariehamn

Wed 5/8

17:10-19:55

1 stop4h 45m

£354

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Thu 17/9

07:30-09:45

1 stop24h 15m

Mariehamn

Sun 20/9

22:00-20:40

1 stop24h 40m

£366

LondonMariehamn

LHR - MHQ

LHRMHQ

London Heathrow

Mon 4/5

06:40-16:45

2 stops8h 05m

Mariehamn

Sun 10/5

16:00-19:55

1 stop5h 55m

£369

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Mariehamn from

How to get the cheapest flight ticket from London Heathrow Airport to Mariehamn

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from London Heathrow to Mariehamn?

Finnair is the most popular carrier operating from London Heathrow to Mariehamn

When to book flights from London Heathrow Airport to Mariehamn

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Mariehamn according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Mariehamn (LHR to MHQ) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Mariehamn

Fastest flight time

6h 00m

Direct flights

None
The fastest flight from London Heathrow Airport to Mariehamn takes 6h 00m
There are no direct flights from London Heathrow Airport to Mariehamn. There are no popular flight routes from London Heathrow Airport to Mariehamn.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Mariehamn

  • How far is London Heathrow to Mariehamn by plane?

    Mariehamn is 984.1 mi away from London Heathrow. Flights usually cover this in 6h 00m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London Heathrow Airport to Mariehamn Airport?

    Prices for flights from London Heathrow Airport to Mariehamn Airport are refreshed on a daily basis.

  • How old do you have to be to fly from London Heathrow Airport to Mariehamn Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Mariehamn Airport.

  • What documentation or ID do you need to fly to Mariehamn Airport?

    The travel and health documents you'll need for your trip to Mariehamn Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Mariehamn Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from London to Mariehamn?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Mariehamn . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Mariehamn with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Mariehamn from London with this policy.

How can momondo help me find flights from London to Mariehamn?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Mariehamn from London.

I’m not ready to book a flight from London to Mariehamn right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Mariehamn now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Mariehamn and let you know when they change.

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