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Cheap flights from London Heathrow Airport to Trieste from C$ 209

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 19/4. 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
1 adult, Economy, 0 bags

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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.
ITA Airways Logo
4:30 p.m. - 10:55 p.m.
LHR
-
TRS
5h 25m
1 stop
ITA Airways Logo
3:15 p.m. - 9:40 a.m.
TRS
-
LHR
19h 25m
1 stop
C$ 284ITA Airways
Sat, 5 Sep - Sat, 19 Sep
ITA Airways Logo
4:30 p.m. - 10:55 p.m.
LHR
-
TRS
5h 25m
1 stop
ITA Airways Logo
7:15 p.m. - 9:40 a.m.
TRS
-
LHR
15h 25m
1 stop
C$ 296ITA Airways
Thu, 7 May - Sat, 9 May
ITA Airways Logo
10:30 a.m. - 6:30 p.m.
LHR
-
TRS
7h 00m
1 stop
ITA Airways Logo
7:15 p.m. - 9:40 a.m.
TRS
-
LHR
15h 25m
1 stop
C$ 300ITA Airways
Fri, 4 Sep - Sat, 19 Sep
ITA Airways Logo
4:30 p.m. - 10:55 p.m.
LHR
-
TRS
5h 25m
1 stop
ITA Airways Logo
7:15 p.m. - 9:40 a.m.
TRS
-
LHR
15h 25m
1 stop
C$ 302ITA Airways
Fri, 29 May - Thu, 11 Jun
ITA Airways Logo
4:30 p.m. - 10:55 p.m.
LHR
-
TRS
5h 25m
1 stop
ITA Airways Logo
11:15 a.m. - 3:40 p.m.
TRS
-
LHR
5h 25m
1 stop
C$ 311ITA Airways
Thu, 7 May - Sat, 9 May
Lufthansa Logo
7:30 a.m. - 10:15 p.m.
LHR
-
TRS
13h 45m
1 stop
Lufthansa Logo
2:45 p.m. - 6:40 p.m.
TRS
-
LHR
4h 55m
1 stop
C$ 313Lufthansa
Fri, 14 Aug - Tue, 18 Aug
Lufthansa Logo
3:30 p.m. - 10:25 p.m.
LHR
-
TRS
5h 55m
1 stop
Lufthansa Logo
2:50 p.m. - 10:10 p.m.
TRS
-
LHR
8h 20m
1 stop
C$ 314Lufthansa
Thu, 7 May - Mon, 11 May
Lufthansa Logo
8:30 a.m. - 9:55 p.m.
LHR
-
TRS
12h 25m
1 stop
Lufthansa Logo
6:20 a.m. - 12:40 p.m.
TRS
-
LHR
7h 20m
1 stop
C$ 316Lufthansa
Sat, 30 May - Tue, 9 Jun
ITA Airways Logo
4:30 p.m. - 10:25 a.m.
LHR
-
TRS
16h 55m
1 stop
ITA Airways Logo
7:15 p.m. - 9:40 a.m.
TRS
-
LHR
15h 25m
1 stop
C$ 321ITA Airways
Fri, 29 May - Sat, 6 Jun
Lufthansa Logo
8:30 a.m. - 10:15 p.m.
LHR
-
TRS
12h 45m
1 stop
Lufthansa Logo
6:10 a.m. - 5:40 p.m.
TRS
-
LHR
12h 30m
1 stop
C$ 327Lufthansa
Sun, 5 Jul - Sun, 12 Jul

ITA Airways flights from London Heathrow Airport to Trieste

Our best ITA Airways deals on London Heathrow Airport to Trieste flight tickets
ITA Airways
5 Sep
LHR4:30 p.m.London Heathrow
5h 25m
1 stop
TRS10:55 p.m.Trieste Ronchi dei Legionari
19 Sep
TRS3:15 p.m.Trieste Ronchi dei Legionari
19h 25m
1 stop
LHR9:40 a.m.London Heathrow
C$ 284
ITA Airways
7 May
LHR4:30 p.m.London Heathrow
5h 25m
1 stop
TRS10:55 p.m.Trieste Ronchi dei Legionari
9 May
TRS7:15 p.m.Trieste Ronchi dei Legionari
15h 25m
1 stop
LHR9:40 a.m.London Heathrow
C$ 296
ITA Airways
4 Sep
LHR10:30 a.m.London Heathrow
7h 00m
1 stop
TRS6:30 p.m.Trieste Ronchi dei Legionari
19 Sep
TRS7:15 p.m.Trieste Ronchi dei Legionari
15h 25m
1 stop
LHR9:40 a.m.London Heathrow
C$ 300

Lufthansa flights from London Heathrow Airport to Trieste

Our best Lufthansa deals on London Heathrow Airport to Trieste flight tickets
Lufthansa
14 Aug
LHR7:30 a.m.London Heathrow
13h 45m
1 stop
TRS10:15 p.m.Trieste Ronchi dei Legionari
18 Aug
TRS2:45 p.m.Trieste Ronchi dei Legionari
4h 55m
1 stop
LHR6:40 p.m.London Heathrow
C$ 313
Lufthansa
7 May
LHR3:30 p.m.London Heathrow
5h 55m
1 stop
TRS10:25 p.m.Trieste Ronchi dei Legionari
11 May
TRS2:50 p.m.Trieste Ronchi dei Legionari
8h 20m
1 stop
LHR10:10 p.m.London Heathrow
C$ 314
Lufthansa
30 May
LHR8:30 a.m.London Heathrow
12h 25m
1 stop
TRS9:55 p.m.Trieste Ronchi dei Legionari
9 Jun
TRS6:20 a.m.Trieste Ronchi dei Legionari
7h 20m
1 stop
LHR12:40 p.m.London Heathrow
C$ 316

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 22 March 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

Cheapest round-trip

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 5/9

4:30 p.m.-10:55 p.m.

1 stop5h 25m

Trieste Ronchi dei Legionari

Sat 19/9

3:15 p.m.-9:40 a.m.

1 stop19h 25m

C$ 284

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 7/5

4:30 p.m.-10:55 p.m.

1 stop5h 25m

Trieste Ronchi dei Legionari

Sat 9/5

7:15 p.m.-9:40 a.m.

1 stop15h 25m

C$ 296

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 4/9

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

1 stop7h 00m

Trieste Ronchi dei Legionari

Sat 19/9

7:15 p.m.-9:40 a.m.

1 stop15h 25m

C$ 300

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 29/5

4:30 p.m.-10:55 p.m.

1 stop5h 25m

Trieste Ronchi dei Legionari

Thu 11/6

7:15 p.m.-9:40 a.m.

1 stop15h 25m

C$ 302
Quickest round-trip

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 7/5

4:30 p.m.-10:55 p.m.

1 stop5h 25m

Trieste Ronchi dei Legionari

Sat 9/5

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

1 stop5h 25m

C$ 311

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 14/8

7:30 a.m.-10:15 p.m.

1 stop13h 45m

Trieste Ronchi dei Legionari

Tue 18/8

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

1 stop4h 55m

C$ 313

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 7/5

3:30 p.m.-10:25 p.m.

1 stop5h 55m

Trieste Ronchi dei Legionari

Mon 11/5

2:50 p.m.-10:10 p.m.

1 stop8h 20m

C$ 314

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 30/5

8:30 a.m.-9:55 p.m.

1 stop12h 25m

Trieste Ronchi dei Legionari

Tue 9/6

6:20 a.m.-12:40 p.m.

1 stop7h 20m

C$ 316

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 29/5

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

1 stop16h 55m

Trieste Ronchi dei Legionari

Sat 6/6

7:15 p.m.-9:40 a.m.

1 stop15h 25m

C$ 321

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 5/7

8:30 a.m.-10:15 p.m.

1 stop12h 45m

Trieste Ronchi dei Legionari

Sun 12/7

6:10 a.m.-5:40 p.m.

1 stop12h 30m

C$ 326

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 cheapest airline that flies from London Heathrow to Trieste Ronchi dei Legionari?

ITA Airways and Lufthansa 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