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Cheap flights from London Heathrow Airport to Trieste from C$ 315

This is the cheapest round-trip 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 15/1. 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

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Find the cheapest flights from London Heathrow Airport to Trieste

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
6:30 a.m. - 2:10 p.m.
LHR
-
TRS
6h 40m1 stop
Lufthansa Logo
6:15 a.m. - 2:45 p.m.
TRS
-
LHR
9h 30m1 stop
C$ 315Lufthansa
Thu, 15 Jan - Thu, 22 Jan
Lufthansa Logo
6:30 a.m. - 2:00 p.m.
LHR
-
TRS
6h 30m1 stop
Lufthansa Logo
6:25 a.m. - 10:45 a.m.
TRS
-
LHR
5h 20m1 stop
C$ 336Lufthansa
Mon, 16 Feb - Fri, 20 Feb
Lufthansa Logo
8:15 p.m. - 2:00 p.m.
LHR
-
TRS
16h 45m2 stops
Lufthansa Logo
2:40 p.m. - 6:45 p.m.
TRS
-
LHR
5h 05m1 stop
C$ 353Lufthansa
Tue, 10 Mar - Tue, 17 Mar
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$ 358Lufthansa
Sat, 10 Jan - Sat, 17 Jan
Lufthansa Logo
8:30 a.m. - 2:10 p.m.
LHR
-
TRS
4h 40m1 stop
Lufthansa Logo
3:00 p.m. - 8:05 a.m.
TRS
-
LHR
18h 05m2 stops
C$ 373Lufthansa
Thu, 22 Jan - Sun, 25 Jan
Lufthansa Logo
8:15 p.m. - 2:05 p.m.
LHR
-
TRS
16h 50m2 stops
Lufthansa Logo
3:00 p.m. - 9:00 p.m.
TRS
-
LHR
7h 00m2 stops
C$ 395Lufthansa
Sat, 10 Jan - Sat, 17 Jan
Lufthansa Logo
6:30 a.m. - 2:05 p.m.
LHR
-
TRS
6h 35m1 stop
Lufthansa Logo
6:25 a.m. - 2:45 p.m.
TRS
-
LHR
9h 20m1 stop
C$ 401Lufthansa
Sun, 15 Feb - Fri, 20 Feb
Lufthansa Logo
8:15 p.m. - 2:00 p.m.
LHR
-
TRS
16h 45m2 stops
Lufthansa Logo
6:25 a.m. - 9:45 a.m.
TRS
-
LHR
4h 20m1 stop
C$ 402Lufthansa
Sun, 15 Feb - Fri, 20 Feb
Lufthansa Logo
6:30 a.m. - 2:05 p.m.
LHR
-
TRS
6h 35m1 stop
Lufthansa Logo
6:15 a.m. - 1:00 p.m.
TRS
-
LHR
7h 45m2 stops
C$ 421Lufthansa
Sun, 15 Feb - Thu, 19 Feb
KLM Logo
11:45 a.m. - 10:55 p.m.
LHR
-
TRS
10h 10m2 stops
KLM Logo
6:35 a.m. - 7:15 p.m.
TRS
-
LHR
13h 40m2 stops
C$ 536KLM
Sun, 15 Feb - Wed, 18 Feb

KLM flights from London Heathrow Airport to Trieste

Our best KLM deals on London Heathrow Airport to Trieste flight tickets
KLM
15 Feb
LHR11:45 a.m.London Heathrow
10h 10m
2 stops
TRS10:55 p.m.Trieste Ronchi dei Legionari
18 Feb
TRS6:35 a.m.Trieste Ronchi dei Legionari
13h 40m
2 stops
LHR7:15 p.m.London Heathrow
C$ 536
Find similar
KLM
17 Feb
LHR11:45 a.m.London Heathrow
10h 10m
2 stops
TRS10:55 p.m.Trieste Ronchi dei Legionari
18 Feb
TRS6:35 a.m.Trieste Ronchi dei Legionari
13h 40m
2 stops
LHR7:15 p.m.London Heathrow
C$ 613
Find similar
KLM
15 Feb
LHR11:45 a.m.London Heathrow
10h 10m
2 stops
TRS10:55 p.m.Trieste Ronchi dei Legionari
19 Feb
TRS6:35 a.m.Trieste Ronchi dei Legionari
11h 25m
2 stops
LHR5:00 p.m.London Heathrow
C$ 614
Find similar

Lufthansa flights from London Heathrow Airport to Trieste

Our best Lufthansa deals on London Heathrow Airport to Trieste flight tickets
Lufthansa
15 Jan
LHR6:30 a.m.London Heathrow
6h 40m
1 stop
TRS2:10 p.m.Trieste Ronchi dei Legionari
22 Jan
TRS6:15 a.m.Trieste Ronchi dei Legionari
9h 30m
1 stop
LHR2:45 p.m.London Heathrow
C$ 315
Find similar
Lufthansa
16 Feb
LHR6:30 a.m.London Heathrow
6h 30m
1 stop
TRS2:00 p.m.Trieste Ronchi dei Legionari
20 Feb
TRS6:25 a.m.Trieste Ronchi dei Legionari
5h 20m
1 stop
LHR10:45 a.m.London Heathrow
C$ 336
Find similar
Lufthansa
10 Mar
LHR8:15 p.m.London Heathrow
16h 45m
2 stops
TRS2:00 p.m.Trieste Ronchi dei Legionari
17 Mar
TRS2:40 p.m.Trieste Ronchi dei Legionari
5h 05m
1 stop
LHR6:45 p.m.London Heathrow
C$ 352
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 15 December 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 15/1

6:30 a.m.-2:10 p.m.

1 stop6h 40m

Trieste Ronchi dei Legionari

Thu 22/1

6:15 a.m.-2:45 p.m.

1 stop9h 30m

C$ 315

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 16/2

6:30 a.m.-2:00 p.m.

1 stop6h 30m

Trieste Ronchi dei Legionari

Fri 20/2

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

1 stop5h 20m

C$ 336

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Tue 10/3

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

2 stops16h 45m

Trieste Ronchi dei Legionari

Tue 17/3

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

1 stop5h 05m

C$ 352

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 10/1

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

1 stop6h 35m

Trieste Ronchi dei Legionari

Sat 17/1

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

2 stops7h 00m

C$ 358

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 22/1

8:30 a.m.-2:10 p.m.

1 stop4h 40m

Trieste Ronchi dei Legionari

Sun 25/1

3:00 p.m.-8:05 a.m.

2 stops18h 05m

C$ 373

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 10/1

8:15 p.m.-2:05 p.m.

2 stops16h 50m

Trieste Ronchi dei Legionari

Sat 17/1

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

2 stops7h 00m

C$ 395

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 15/2

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

1 stop6h 35m

Trieste Ronchi dei Legionari

Fri 20/2

6:25 a.m.-2:45 p.m.

1 stop9h 20m

C$ 401

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 15/2

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

2 stops16h 45m

Trieste Ronchi dei Legionari

Fri 20/2

6:25 a.m.-9:45 a.m.

1 stop4h 20m

C$ 402

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 15/2

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

1 stop6h 35m

Trieste Ronchi dei Legionari

Thu 19/2

6:15 a.m.-1:00 p.m.

2 stops7h 45m

C$ 421

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 15/2

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

2 stops10h 10m

Trieste Ronchi dei Legionari

Wed 18/2

6:35 a.m.-7:15 p.m.

2 stops13h 40m

C$ 536

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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 cheapest airline that flies from London Heathrow to Trieste Ronchi dei Legionari?

Lufthansa and Turkish Airlines are the most popular carriers operating from London Heathrow to Trieste Ronchi dei Legionari

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

Fastest flight time

18h 25m

Direct flights

None
The fastest flight from London Heathrow Airport to Trieste takes 18h 25m
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 18h 25m.

  • 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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British Airways