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Cheap flights from London Heathrow Airport to Trieste from C$ 250

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 5/3. 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
7:30 a.m. - 2:05 p.m.
LHR
-
TRS
5h 35m
1 stop
Lufthansa Logo
6:25 a.m. - 12:50 p.m.
TRS
-
LHR
7h 25m
1 stop
C$ 316Lufthansa
Sat, 14 Mar - Sat, 21 Mar
Lufthansa Logo
8:30 a.m. - 2:05 p.m.
LHR
-
TRS
4h 35m
1 stop
Lufthansa Logo
2:40 p.m. - 6:45 p.m.
TRS
-
LHR
5h 05m
1 stop
C$ 318Lufthansa
Thu, 12 Mar - Mon, 16 Mar
ITA Airways Logo
4:30 p.m. - 10:25 a.m.
LHR
-
TRS
16h 55m
1 stop
ITA Airways Logo
11:15 a.m. - 3:40 p.m.
TRS
-
LHR
5h 25m
1 stop
C$ 322ITA Airways
Sat, 2 May - Sat, 9 May
Lufthansa Logo
8:15 p.m. - 2:05 p.m.
LHR
-
TRS
16h 50m
2 stops
Lufthansa Logo
6:25 a.m. - 2:45 p.m.
TRS
-
LHR
9h 20m
1 stop
C$ 353Lufthansa
Sat, 14 Mar - Sat, 21 Mar
Lufthansa Logo
8:30 a.m. - 2:05 p.m.
LHR
-
TRS
4h 35m
1 stop
Lufthansa Logo
3:00 p.m. - 9:00 p.m.
TRS
-
LHR
7h 00m
2 stops
C$ 360Lufthansa
Sat, 14 Mar - Sat, 21 Mar
Lufthansa Logo
5:30 p.m. - 10:40 p.m.
LHR
-
TRS
4h 10m
1 stop
Lufthansa Logo
2:40 p.m. - 9:00 p.m.
TRS
-
LHR
7h 20m
2 stops
C$ 361Lufthansa
Thu, 12 Mar - Mon, 16 Mar
Lufthansa Logo
8:30 a.m. - 2:05 p.m.
LHR
-
TRS
4h 35m
1 stop
Lufthansa Logo
3:00 p.m. - 6:45 p.m.
TRS
-
LHR
4h 45m
1 stop
C$ 381Lufthansa
Thu, 12 Mar - Sun, 15 Mar
Lufthansa Logo
11:10 a.m. - 10:40 p.m.
LHR
-
TRS
10h 30m
2 stops
Lufthansa Logo
2:40 p.m. - 9:00 p.m.
TRS
-
LHR
7h 20m
2 stops
C$ 383Lufthansa
Thu, 26 Feb - Mon, 9 Mar
Lufthansa Logo
8:15 p.m. - 2:05 p.m.
LHR
-
TRS
16h 50m
2 stops
Lufthansa Logo
3:00 p.m. - 9:00 p.m.
TRS
-
LHR
7h 00m
2 stops
C$ 396Lufthansa
Sat, 14 Mar - Sat, 21 Mar
Lufthansa Logo
1:50 p.m. - 10:40 p.m.
LHR
-
TRS
7h 50m
2 stops
Lufthansa Logo
2:40 p.m. - 9:00 p.m.
TRS
-
LHR
7h 20m
2 stops
C$ 410Lufthansa
Thu, 12 Mar - Mon, 16 Mar

Lufthansa flights from London Heathrow Airport to Trieste

Our best Lufthansa deals on London Heathrow Airport to Trieste flight tickets
Lufthansa
14 Mar
LHR7:30 a.m.London Heathrow
5h 35m
1 stop
TRS2:05 p.m.Trieste Ronchi dei Legionari
21 Mar
TRS6:25 a.m.Trieste Ronchi dei Legionari
7h 25m
1 stop
LHR12:50 p.m.London Heathrow
C$ 316
Lufthansa
12 Mar
LHR8:30 a.m.London Heathrow
4h 35m
1 stop
TRS2:05 p.m.Trieste Ronchi dei Legionari
16 Mar
TRS2:40 p.m.Trieste Ronchi dei Legionari
5h 05m
1 stop
LHR6:45 p.m.London Heathrow
C$ 318
Lufthansa
14 Mar
LHR8:15 p.m.London Heathrow
16h 50m
2 stops
TRS2:05 p.m.Trieste Ronchi dei Legionari
21 Mar
TRS6:25 a.m.Trieste Ronchi dei Legionari
9h 20m
1 stop
LHR2:45 p.m.London Heathrow
C$ 353

KLM flights from London Heathrow Airport to Trieste

Our best KLM deals on London Heathrow Airport to Trieste flight tickets
KLM
24 Mar
LHR10:00 a.m.London Heathrow
11h 55m
2 stops
TRS10:55 p.m.Trieste Ronchi dei Legionari
27 Mar
TRS6:35 a.m.Trieste Ronchi dei Legionari
10h 30m
2 stops
LHR4:05 p.m.London Heathrow
C$ 557
KLM
29 Jul
LHR6:30 a.m.London Heathrow
11h 00m
2 stops
TRS6:30 p.m.Trieste Ronchi dei Legionari
12 Aug
TRS6:35 a.m.Trieste Ronchi dei Legionari
12h 00m
2 stops
LHR5:35 p.m.London Heathrow
C$ 575
KLM
4 May
LHR6:30 a.m.London Heathrow
11h 00m
2 stops
TRS6:30 p.m.Trieste Ronchi dei Legionari
7 May
TRS3:15 p.m.Trieste Ronchi dei Legionari
6h 40m
2 stops
LHR8:55 p.m.London Heathrow
C$ 610

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 30 January 2026.
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

Sat 14/3

7:30 a.m.-2:05 p.m.

1 stop5h 35m

Trieste Ronchi dei Legionari

Sat 21/3

6:25 a.m.-12:50 p.m.

1 stop7h 25m

C$ 316

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 12/3

8:30 a.m.-2:05 p.m.

1 stop4h 35m

Trieste Ronchi dei Legionari

Mon 16/3

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

1 stop5h 05m

C$ 318

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 2/5

4:30 p.m.-10:25 a.m.

1 stop16h 55m

Trieste Ronchi dei Legionari

Sat 9/5

11:15 a.m.-3:40 p.m.

1 stop5h 25m

C$ 322

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 14/3

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

2 stops16h 50m

Trieste Ronchi dei Legionari

Sat 21/3

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

1 stop9h 20m

C$ 353

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 14/3

8:30 a.m.-2:05 p.m.

1 stop4h 35m

Trieste Ronchi dei Legionari

Sat 21/3

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

2 stops7h 00m

C$ 360

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 12/3

5:30 p.m.-10:40 p.m.

1 stop4h 10m

Trieste Ronchi dei Legionari

Mon 16/3

2:40 p.m.-9:00 p.m.

2 stops7h 20m

C$ 361

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 12/3

8:30 a.m.-2:05 p.m.

1 stop4h 35m

Trieste Ronchi dei Legionari

Sun 15/3

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

1 stop4h 45m

C$ 381

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 26/2

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

2 stops10h 30m

Trieste Ronchi dei Legionari

Mon 9/3

2:40 p.m.-9:00 p.m.

2 stops7h 20m

C$ 383

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 14/3

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

2 stops16h 50m

Trieste Ronchi dei Legionari

Sat 21/3

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

2 stops7h 00m

C$ 396

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 12/3

1:50 p.m.-10:40 p.m.

2 stops7h 50m

Trieste Ronchi dei Legionari

Mon 16/3

2:40 p.m.-9:00 p.m.

2 stops7h 20m

C$ 410

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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 KLM 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

5h 25m

Direct flights

None
The fastest flight from London Heathrow Airport to Trieste takes 5h 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 5h 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