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Cheap flights from London Heathrow Airport to Trieste from £77

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 9/6. 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
0 bags

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Find the cheapest flights from London Heathrow Airport to Trieste

Cheap return flights

Enter your travel dates to find the best prices.
ITA Airways Logo
16:30 - 22:55
LHR
-
TRS
5h 25m1 stop
ITA Airways Logo
11:15 - 15:40
TRS
-
LHR
5h 25m1 stop
£99ITA Airways
Wed, 6 May - Wed, 13 May
Multiple Airlines Logo
09:55 - 22:45
LHR
-
TRS
11h 50m1 stop
Multiple Airlines Logo
18:10 - 09:10
TRS
-
LHR
16h 00m1 stop
£123Multiple Airlines
Sat, 10 Jan - Sat, 17 Jan
ITA Airways Logo
16:30 - 22:55
LHR
-
TRS
5h 25m1 stop
ITA Airways Logo
19:15 - 09:40
TRS
-
LHR
15h 25m1 stop
£145ITA Airways
Wed, 6 May - Wed, 20 May
ITA Airways Logo
16:30 - 10:25
LHR
-
TRS
16h 55m1 stop
ITA Airways Logo
19:15 - 09:40
TRS
-
LHR
15h 25m1 stop
£146ITA Airways
Wed, 6 May - Wed, 20 May
Lufthansa Logo
17:30 - 22:40
LHR
-
TRS
4h 10m1 stop
Lufthansa Logo
15:00 - 22:20
TRS
-
LHR
8h 20m1 stop
£166Lufthansa
Wed, 25 Feb - Sun, 1 Mar
Lufthansa Logo
08:30 - 14:10
LHR
-
TRS
4h 40m1 stop
Lufthansa Logo
14:50 - 22:20
TRS
-
LHR
8h 30m1 stop
£167Lufthansa
Thu, 15 Jan - Thu, 22 Jan
Lufthansa Logo
06:30 - 14:10
LHR
-
TRS
6h 40m1 stop
Lufthansa Logo
06:15 - 14:45
TRS
-
LHR
9h 30m1 stop
£171Lufthansa
Thu, 15 Jan - Thu, 22 Jan
Multiple Airlines Logo
09:55 - 22:45
LHR
-
TRS
11h 50m1 stop
Multiple Airlines Logo
21:05 - 08:05
TRS
-
LHR
12h 00m1 stop
£173Multiple Airlines
Sat, 7 Feb - Sun, 8 Feb
Multiple Airlines Logo
20:50 - 19:55
LHR
-
TRS
22h 05m2 stops
Multiple Airlines Logo
06:10 - 20:05
TRS
-
LHR
14h 55m2 stops
£176Multiple Airlines
Thu, 29 Jan - Sun, 1 Feb
Lufthansa Logo
06:30 - 14:00
LHR
-
TRS
6h 30m1 stop
Lufthansa Logo
06:25 - 10:45
TRS
-
LHR
5h 20m1 stop
£182Lufthansa
Mon, 16 Feb - Fri, 20 Feb

ITA Airways flights from London Heathrow Airport to Trieste

Our best ITA Airways deals on London Heathrow Airport to Trieste flight tickets
ITA Airways
6 May
LHR16:30London Heathrow
5h 25m
1 stop
TRS22:55Trieste Ronchi dei Legionari
13 May
TRS11:15Trieste Ronchi dei Legionari
5h 25m
1 stop
LHR15:40London Heathrow
£99
Find similar
ITA Airways
6 May
LHR16:30London Heathrow
5h 25m
1 stop
TRS22:55Trieste Ronchi dei Legionari
20 May
TRS19:15Trieste Ronchi dei Legionari
15h 25m
1 stop
LHR09:40London Heathrow
£145
Find similar
ITA Airways
6 May
LHR16:30London Heathrow
16h 55m
1 stop
TRS10:25Trieste Ronchi dei Legionari
20 May
TRS19:15Trieste Ronchi dei Legionari
15h 25m
1 stop
LHR09:40London Heathrow
£146
Find similar

Lufthansa flights from London Heathrow Airport to Trieste

Our best Lufthansa deals on London Heathrow Airport to Trieste flight tickets
Lufthansa
25 Feb
LHR17:30London Heathrow
4h 10m
1 stop
TRS22:40Trieste Ronchi dei Legionari
1 Mar
TRS15:00Trieste Ronchi dei Legionari
8h 20m
1 stop
LHR22:20London Heathrow
£166
Find similar
Lufthansa
15 Jan
LHR06:30London Heathrow
6h 40m
1 stop
TRS14:10Trieste Ronchi dei Legionari
22 Jan
TRS06:15Trieste Ronchi dei Legionari
4h 30m
1 stop
LHR09:45London Heathrow
£167
Find similar
Lufthansa
15 Jan
LHR06:30London Heathrow
6h 40m
1 stop
TRS14:10Trieste Ronchi dei Legionari
22 Jan
TRS06:15Trieste Ronchi dei Legionari
9h 30m
1 stop
LHR14:45London Heathrow
£171
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 16 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

Wed 6/5

16:30-22:55

1 stop5h 25m

Trieste Ronchi dei Legionari

Wed 13/5

11:15-15:40

1 stop5h 25m

£99

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 10/1

09:55-22:45

1 stop11h 50m

Trieste Ronchi dei Legionari

Sat 17/1

18:10-09:10

1 stop16h 00m

£123

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 6/5

16:30-22:55

1 stop5h 25m

Trieste Ronchi dei Legionari

Wed 20/5

19:15-09:40

1 stop15h 25m

£145

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 6/5

16:30-10:25

1 stop16h 55m

Trieste Ronchi dei Legionari

Wed 20/5

19:15-09:40

1 stop15h 25m

£146

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 25/2

17:30-22:40

1 stop4h 10m

Trieste Ronchi dei Legionari

Sun 1/3

15:00-22:20

1 stop8h 20m

£166

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 15/1

08:30-14:10

1 stop4h 40m

Trieste Ronchi dei Legionari

Thu 22/1

14:50-22:20

1 stop8h 30m

£167

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 15/1

06:30-14:10

1 stop6h 40m

Trieste Ronchi dei Legionari

Thu 22/1

06:15-14:45

1 stop9h 30m

£171

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 7/2

09:55-22:45

1 stop11h 50m

Trieste Ronchi dei Legionari

Sun 8/2

21:05-08:05

1 stop12h 00m

£173

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 29/1

20:50-19:55

2 stops22h 05m

Trieste Ronchi dei Legionari

Sun 1/2

06:10-20:05

2 stops14h 55m

£176

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 16/2

06:30-14:00

1 stop6h 30m

Trieste Ronchi dei Legionari

Fri 20/2

06:25-10:45

1 stop5h 20m

£182

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 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 £74. 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 £139.

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

The cheapest time of day to fly to Trieste is in the afternoon when flights can be purchased for as low as £98. Flights to Trieste are more costly in the morning, with an average ticket price of £112. Departure times in the morning 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 25% 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

Fastest flight time

4h 40m

Direct flights

None
The fastest flight from London Heathrow Airport to Trieste takes 4h 40m
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 40m, 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 £150Free CancellationRating
6.8
7,631 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.

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
British Airways
Lufthansa
easyJet
KLM
Brussels Airlines