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Cheap flights from London Heathrow Airport to Trieste from C$ 254

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 Trieste departing on 20/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Heathrow Airport to Trieste (LHR-TRS)

Cheap round-trip flights

Lufthansa Logo
11:30 a.m. - 10:40 p.m.LHR-TRS
10h 10m1 stop
Lufthansa Logo
3:00 p.m. - 10:20 p.m.TRS-LHR
8h 20m1 stop
C$ 323Lufthansa
Find Deal
Thu, 4 Dec - Sun, 7 Dec
Lufthansa Logo
5:30 p.m. - 10:30 p.m.LHR-TRS
4h 00m1 stop
Lufthansa Logo
3:00 p.m. - 6:45 p.m.TRS-LHR
4h 45m1 stop
C$ 326Lufthansa
Find Deal
Fri, 6 Feb - Sun, 8 Feb
Lufthansa Logo
8:15 p.m. - 2:00 p.m.LHR-TRS
16h 45m2 stops
Lufthansa Logo
6:25 a.m. - 10:45 a.m.TRS-LHR
5h 20m1 stop
C$ 357Lufthansa
Find Deal
Sun, 2 Nov - Fri, 7 Nov
Lufthansa Logo
6:30 a.m. - 2:05 p.m.LHR-TRS
6h 35m1 stop
Lufthansa Logo
3:00 p.m. - 9:00 p.m.TRS-LHR
7h 00m2 stops
C$ 366Lufthansa
Find Deal
Thu, 4 Dec - Sun, 7 Dec
Lufthansa Logo
3:30 p.m. - 10:30 p.m.LHR-TRS
6h 00m1 stop
Lufthansa Logo
3:00 p.m. - 9:00 p.m.TRS-LHR
7h 00m2 stops
C$ 370Lufthansa
Find Deal
Fri, 6 Feb - Sun, 8 Feb
Lufthansa Logo
10:30 a.m. - 10:35 p.m.LHR-TRS
11h 05m1 stop
Lufthansa Logo
2:45 p.m. - 6:40 p.m.TRS-LHR
4h 55m1 stop
C$ 386Lufthansa
Find Deal
Thu, 11 Sep - Wed, 17 Sep
KLM Logo
10:00 a.m. - 6:30 p.m.LHR-TRS
7h 30m2 stops
KLM Logo
6:35 a.m. - 4:05 p.m.TRS-LHR
10h 30m2 stops
C$ 416KLM
Find Deal
Fri, 12 Dec - Tue, 23 Dec
KLM Logo
10:00 a.m. - 6:30 p.m.LHR-TRS
7h 30m2 stops
KLM Logo
6:35 a.m. - 1:50 p.m.TRS-LHR
8h 15m2 stops
C$ 449KLM
Find Deal
Fri, 5 Dec - Tue, 9 Dec
KLM Logo
10:00 a.m. - 6:30 p.m.LHR-TRS
7h 30m2 stops
KLM Logo
6:35 a.m. - 4:05 p.m.TRS-LHR
10h 30m2 stops
C$ 469KLM
Find Deal
Thu, 11 Dec - Tue, 23 Dec
Logo
11:45 a.m. - 10:55 p.m.LHR-TRS
10h 10m2 stops
Logo
11:15 a.m. - 9:25 p.m.TRS-LHR
11h 10m2 stops
C$ 798
Find Deal
Sat, 20 Sep - Sat, 27 Sep

Lufthansa flights from London Heathrow Airport to Trieste

Our best Lufthansa deals on London Heathrow Airport to Trieste flight tickets
Lufthansa
4 Dec
LHR11:30 a.m.London Heathrow
10h 10m
1 stop
TRS10:40 p.m.Trieste Ronchi dei Legionari
7 Dec
TRS3:00 p.m.Trieste Ronchi dei Legionari
8h 20m
1 stop
LHR10:20 p.m.London Heathrow
C$ 323
Find similar
Lufthansa
6 Feb
LHR5:30 p.m.London Heathrow
4h 00m
1 stop
TRS10:30 p.m.Trieste Ronchi dei Legionari
8 Feb
TRS3:00 p.m.Trieste Ronchi dei Legionari
4h 45m
1 stop
LHR6:45 p.m.London Heathrow
C$ 326
Find similar
Lufthansa
2 Nov
LHR8:15 p.m.London Heathrow
16h 45m
2 stops
TRS2:00 p.m.Trieste Ronchi dei Legionari
7 Nov
TRS6:25 a.m.Trieste Ronchi dei Legionari
5h 20m
1 stop
LHR10:45 a.m.London Heathrow
C$ 357
Find similar

KLM flights from London Heathrow Airport to Trieste

Our best KLM deals on London Heathrow Airport to Trieste flight tickets
KLM
12 Dec
LHR10:00 a.m.London Heathrow
7h 30m
2 stops
TRS6:30 p.m.Trieste Ronchi dei Legionari
23 Dec
TRS6:35 a.m.Trieste Ronchi dei Legionari
10h 30m
2 stops
LHR4:05 p.m.London Heathrow
C$ 416
Find similar
KLM
5 Dec
LHR10:00 a.m.London Heathrow
7h 30m
2 stops
TRS6:30 p.m.Trieste Ronchi dei Legionari
9 Dec
TRS6:35 a.m.Trieste Ronchi dei Legionari
8h 15m
2 stops
LHR1:50 p.m.London Heathrow
C$ 449
Find similar
KLM
11 Dec
LHR10:00 a.m.London Heathrow
7h 30m
2 stops
TRS6:30 p.m.Trieste Ronchi dei Legionari
23 Dec
TRS6:35 a.m.Trieste Ronchi dei Legionari
10h 30m
2 stops
LHR4:05 p.m.London Heathrow
C$ 469
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport to Trieste 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 96,600 searches. Data last updated 1 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Trieste that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 4/12

11:30 a.m.-10:40 p.m.

1 stop10h 10m

Trieste Ronchi dei Legionari

Sun 7/12

3:00 p.m.-10:20 p.m.

1 stop8h 20m

C$ 323

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 6/2

5:30 p.m.-10:30 p.m.

1 stop4h 00m

Trieste Ronchi dei Legionari

Sun 8/2

3:00 p.m.-6:45 p.m.

1 stop4h 45m

C$ 326

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 2/11

8:15 p.m.-2:00 p.m.

2 stops16h 45m

Trieste Ronchi dei Legionari

Fri 7/11

6:25 a.m.-10:45 a.m.

1 stop5h 20m

C$ 357

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 4/12

6:30 a.m.-2:05 p.m.

1 stop6h 35m

Trieste Ronchi dei Legionari

Sun 7/12

3:00 p.m.-9:00 p.m.

2 stops7h 00m

C$ 366

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 6/2

3:30 p.m.-10:30 p.m.

1 stop6h 00m

Trieste Ronchi dei Legionari

Sun 8/2

3:00 p.m.-9:00 p.m.

2 stops7h 00m

C$ 370

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 11/9

10:30 a.m.-10:35 p.m.

1 stop11h 05m

Trieste Ronchi dei Legionari

Wed 17/9

2:45 p.m.-6:40 p.m.

1 stop4h 55m

C$ 386

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 12/12

10:00 a.m.-6:30 p.m.

2 stops7h 30m

Trieste Ronchi dei Legionari

Tue 23/12

6:35 a.m.-4:05 p.m.

2 stops10h 30m

C$ 416

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 5/12

10:00 a.m.-6:30 p.m.

2 stops7h 30m

Trieste Ronchi dei Legionari

Tue 9/12

6:35 a.m.-1:50 p.m.

2 stops8h 15m

C$ 449

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 11/12

10:00 a.m.-6:30 p.m.

2 stops7h 30m

Trieste Ronchi dei Legionari

Tue 23/12

6:35 a.m.-4:05 p.m.

2 stops10h 30m

C$ 469

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 20/9

11:45 a.m.-10:55 p.m.

2 stops10h 10m

Trieste Ronchi dei Legionari

Sat 27/9

11:15 a.m.-9:25 p.m.

2 stops11h 10m

C$ 798

Flights are sorted by cheapest round-trip flights first.

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

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

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 typical price of a round-trip flight between London Heathrow Airport and Trieste?

What is the cheapest month to fly to Trieste?

If you aren’t able to travel during the month of September, then book flights to Trieste from London Heathrow Airport during February instead. Flights to Trieste in February, while not as cheap as those in September, still average around C$ 327.

When to book flights from London Heathrow Airport to Trieste

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

Cheap London Heathrow Airport to Trieste (LHR to TRS) flight deals and tips

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

Direct flights

None
There are no direct flights from London Heathrow Airport to Trieste. There are no popular flight routes from London Heathrow Airport to Trieste.
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  • How far is London Heathrow to Trieste Ronchi dei Legionari by plane?

    Trieste Ronchi dei Legionari is 1226.9 km away from London Heathrow. A reasonable flight in good conditions will take 4h 00m.

  • When did momondo last update prices for flights from London Heathrow Airport to Trieste Ronchi dei Legionari Airport?

    Prices for flights from London Heathrow Airport to Trieste Ronchi dei Legionari Airport are refreshed on a daily basis.

  • How old do you have to be to fly from London Heathrow Airport to Trieste Ronchi dei Legionari Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Trieste Ronchi dei Legionari Airport.

  • What documentation or ID do you need to fly to Trieste Ronchi dei Legionari Airport?

    The travel and health documents required for your trip to Trieste Ronchi dei Legionari Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Trieste Ronchi dei Legionari Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Trieste from London.

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

momondo does allow users to show only those flights to Trieste from London which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Trieste.

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

Of course. momondo tracks the price of London to Trieste flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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