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Cheap flights from London Heathrow Airport to Trieste from £85

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 6/10. 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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0 bags

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Find the cheapest flights from London Heathrow Airport to Trieste (LHR-TRS)

Cheap return flights

Lufthansa Logo
08:30 - 22:25LHR-TRS
12h 55m1 stop
Lufthansa Logo
06:30 - 12:40TRS-LHR
7h 10m1 stop
£170Lufthansa
Find Deal
Sun, 28 Sep - Sun, 5 Oct
Lufthansa Logo
10:30 - 22:25LHR-TRS
10h 55m1 stop
Lufthansa Logo
14:45 - 20:40TRS-LHR
6h 55m1 stop
£173Lufthansa
Find Deal
Fri, 26 Sep - Mon, 29 Sep
Lufthansa Logo
16:30 - 22:25LHR-TRS
4h 55m1 stop
Lufthansa Logo
06:30 - 17:40TRS-LHR
12h 10m1 stop
£174Lufthansa
Find Deal
Sat, 4 Oct - Sat, 18 Oct
Lufthansa Logo
13:45 - 22:25LHR-TRS
7h 40m2 stops
Lufthansa Logo
14:45 - 18:40TRS-LHR
4h 55m1 stop
£181Lufthansa
Find Deal
Tue, 14 Oct - Tue, 21 Oct
Lufthansa Logo
16:30 - 22:25LHR-TRS
4h 55m1 stop
Lufthansa Logo
06:30 - 09:40TRS-LHR
4h 10m1 stop
£185Lufthansa
Find Deal
Fri, 3 Oct - Sun, 19 Oct
Lufthansa Logo
06:35 - 22:40LHR-TRS
15h 05m2 stops
Lufthansa Logo
06:25 - 09:45TRS-LHR
4h 20m1 stop
£186Lufthansa
Find Deal
Thu, 11 Dec - Tue, 23 Dec
Logo
20:50 - 14:10LHR-TRS
16h 20m2 stops
Logo
12:45 - 20:05TRS-LHR
8h 20m1 stop
£187
Find Deal
Tue, 14 Oct - Tue, 21 Oct
Logo
20:50 - 12:20LHR-TRS
14h 30m1 stop
Logo
19:25 - 09:10TRS-LHR
14h 45m2 stops
£193
Find Deal
Mon, 20 Oct - Fri, 24 Oct
KLM Logo
10:00 - 18:30LHR-TRS
7h 30m2 stops
KLM Logo
06:35 - 16:05TRS-LHR
10h 30m2 stops
£224KLM
Find Deal
Fri, 12 Dec - Tue, 23 Dec
KLM Logo
08:40 - 18:30LHR-TRS
8h 50m2 stops
KLM Logo
06:35 - 17:00TRS-LHR
11h 25m2 stops
£299KLM
Find Deal
Sat, 6 Dec - Mon, 8 Dec

Lufthansa flights from London Heathrow Airport to Trieste

Our best Lufthansa deals on London Heathrow Airport to Trieste flight tickets
Lufthansa
28 Sept
LHR08:30London Heathrow
12h 55m
1 stop
TRS22:25Trieste Ronchi dei Legionari
5 Oct
TRS06:30Trieste Ronchi dei Legionari
7h 10m
1 stop
LHR12:40London Heathrow
£170
Find similar
Lufthansa
26 Sept
LHR10:30London Heathrow
10h 55m
1 stop
TRS22:25Trieste Ronchi dei Legionari
29 Sept
TRS14:45Trieste Ronchi dei Legionari
6h 55m
1 stop
LHR20:40London Heathrow
£173
Find similar
Lufthansa
4 Oct
LHR16:30London Heathrow
4h 55m
1 stop
TRS22:25Trieste Ronchi dei Legionari
18 Oct
TRS06:30Trieste Ronchi dei Legionari
12h 10m
1 stop
LHR17:40London Heathrow
£174
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
LHR10:00London Heathrow
7h 30m
2 stops
TRS18:30Trieste Ronchi dei Legionari
23 Dec
TRS06:35Trieste Ronchi dei Legionari
10h 30m
2 stops
LHR16:05London Heathrow
£224
Find similar
KLM
6 Dec
LHR08:40London Heathrow
8h 50m
2 stops
TRS18:30Trieste Ronchi dei Legionari
8 Dec
TRS06:35Trieste Ronchi dei Legionari
11h 25m
2 stops
LHR17:00London Heathrow
£299
Find similar
KLM
10 Sept
LHR11:45London Heathrow
10h 10m
2 stops
TRS22:55Trieste Ronchi dei Legionari
23 Sept
TRS06:35Trieste Ronchi dei Legionari
10h 40m
2 stops
LHR16:15London Heathrow
£382
Find similar

momondo Fare Finder

 
Customise 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 279,928 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

Sun 28/9

08:30-22:25

1 stop12h 55m

Trieste Ronchi dei Legionari

Sun 5/10

06:30-12:40

1 stop7h 10m

£170

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 26/9

10:30-22:25

1 stop10h 55m

Trieste Ronchi dei Legionari

Mon 29/9

14:45-20:40

1 stop6h 55m

£173

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 4/10

16:30-22:25

1 stop4h 55m

Trieste Ronchi dei Legionari

Sat 18/10

06:30-17:40

1 stop12h 10m

£174

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Tue 14/10

13:45-22:25

2 stops7h 40m

Trieste Ronchi dei Legionari

Tue 21/10

14:45-18:40

1 stop4h 55m

£181

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 3/10

16:30-22:25

1 stop4h 55m

Trieste Ronchi dei Legionari

Sun 19/10

06:30-09:40

1 stop4h 10m

£185

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 11/12

06:35-22:40

2 stops15h 05m

Trieste Ronchi dei Legionari

Tue 23/12

06:25-09:45

1 stop4h 20m

£186

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Tue 14/10

20:50-14:10

2 stops16h 20m

Trieste Ronchi dei Legionari

Tue 21/10

12:45-20:05

1 stop8h 20m

£187

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 20/10

20:50-12:20

1 stop14h 30m

Trieste Ronchi dei Legionari

Fri 24/10

19:25-09:10

2 stops14h 45m

£193

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 12/12

10:00-18:30

2 stops7h 30m

Trieste Ronchi dei Legionari

Tue 23/12

06:35-16:05

2 stops10h 30m

£224

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 6/12

08:40-18:30

2 stops8h 50m

Trieste Ronchi dei Legionari

Mon 8/12

06:35-17:00

2 stops11h 25m

£299

Flights are sorted by cheapest return 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?

The month of September is, on average, the cheapest month to fly to Trieste from London Heathrow Airport, with most prices found around £156. The month of February is another great option to travel to Trieste, with average flight prices from London Heathrow Airport averaging around £176.

What is the cheapest day to depart on your flight to Trieste?

On average, the least expensive day to fly to Trieste from London Heathrow Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £76. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Trieste is Saturday, with ticket prices averaging around £144.

What is the cheapest time of day to depart on your flight to Trieste?

The cheapest time of day to fly to Trieste is at midday when flights can be purchased for as low as £92. Flights to Trieste are more costly in the afternoon, with an average ticket price of £129. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on London Heathrow Airport to Trieste flights?

You could potentially save up to 14% on your flight if you consider stops on a London Heathrow Airport to Trieste flight.

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 return 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.
Search flight deals

  • How far is London Heathrow to Trieste Ronchi dei Legionari by plane?

    The distance between London Heathrow and Trieste Ronchi dei Legionari is about 762.4 mi. Flights usually cover this in 4h 05m, depending on flying conditions and air traffic around both airports.

  • 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 updated daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Trieste Ronchi dei Legionari Airport?

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 required travel and health documents for your Trieste Ronchi dei Legionari Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Trieste Ronchi dei Legionari Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from London Heathrow Airport to Trieste?

Best airlines flying from London Heathrow Airport to Trieste

Compare and see reviews for airlines that fly from London Heathrow Airport to Trieste with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom £149Free CancellationRating
6.8
7,375 reviews
Search Lufthansa flights

Travelling to a place near Trieste?

Book flights to Trieste if you plan to visit one of these locations
Udine
Grado

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?

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

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

Once you have performed a search for London to Trieste flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

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

An easier way to manage your Trieste trip

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Fly your favourite airline to Trieste

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
British Airways
Ryanair
easyJet
Turkish Airlines
Qatar Airways
Emirates
Etihad Airways
Lufthansa
Virgin Atlantic
Pegasus Airlines
KLM
Air India