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Cheap flights from London Heathrow Airport to Trieste from £59

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 - 18:30
LHR
-
TRS
25h 00m
1 stop
ITA Airways Logo
11:15 - 09:40
TRS
-
LHR
23h 25m
1 stop
£130ITA Airways
Wed, 1 Jul - Wed, 22 Jul
Multiple Airlines Logo
09:55 - 18:50
LHR
-
TRS
7h 55m
1 stop
Multiple Airlines Logo
18:15 - 09:10
TRS
-
LHR
15h 55m
1 stop
£145Multiple Airlines
Wed, 4 Mar - Mon, 9 Mar
ITA Airways Logo
10:30 - 18:30
LHR
-
TRS
7h 00m
1 stop
ITA Airways Logo
15:15 - 09:40
TRS
-
LHR
19h 25m
1 stop
£148ITA Airways
Mon, 4 May - Mon, 11 May
ITA Airways Logo
10:30 - 10:25
LHR
-
TRS
22h 55m
1 stop
ITA Airways Logo
19:15 - 09:40
TRS
-
LHR
15h 25m
1 stop
£150ITA Airways
Mon, 4 May - Sat, 9 May
ITA Airways Logo
10:30 - 22:55
LHR
-
TRS
11h 25m
1 stop
ITA Airways Logo
15:15 - 09:40
TRS
-
LHR
19h 25m
1 stop
£152ITA Airways
Wed, 3 Jun - Sun, 7 Jun
ITA Airways Logo
10:30 - 22:55
LHR
-
TRS
11h 25m
1 stop
ITA Airways Logo
19:15 - 09:40
TRS
-
LHR
15h 25m
1 stop
£158ITA Airways
Fri, 5 Jun - Wed, 10 Jun
ITA Airways Logo
10:30 - 22:55
LHR
-
TRS
11h 25m
1 stop
ITA Airways Logo
19:15 - 09:40
TRS
-
LHR
15h 25m
1 stop
£160ITA Airways
Wed, 6 May - Wed, 20 May
ITA Airways Logo
10:30 - 22:55
LHR
-
TRS
11h 25m
1 stop
ITA Airways Logo
15:15 - 09:40
TRS
-
LHR
19h 25m
1 stop
£160ITA Airways
Wed, 6 May - Wed, 20 May
ITA Airways Logo
10:30 - 14:30
LHR
-
TRS
27h 00m
1 stop
ITA Airways Logo
11:15 - 09:40
TRS
-
LHR
23h 25m
1 stop
£161ITA Airways
Sat, 13 Jun - Sun, 21 Jun
ITA Airways Logo
16:30 - 22:55
LHR
-
TRS
5h 25m
1 stop
ITA Airways Logo
15:15 - 09:40
TRS
-
LHR
19h 25m
1 stop
£162ITA Airways
Sat, 9 May - Wed, 13 May

ITA Airways flights from London Heathrow Airport to Trieste

Our best ITA Airways deals on London Heathrow Airport to Trieste flight tickets
ITA Airways
1 Jul
LHR16:30London Heathrow
25h 00m
1 stop
TRS18:30Trieste Ronchi dei Legionari
22 Jul
TRS11:15Trieste Ronchi dei Legionari
23h 25m
1 stop
LHR09:40London Heathrow
£130
ITA Airways
4 May
LHR10:30London Heathrow
7h 00m
1 stop
TRS18:30Trieste Ronchi dei Legionari
11 May
TRS15:15Trieste Ronchi dei Legionari
19h 25m
1 stop
LHR09:40London Heathrow
£148
ITA Airways
4 May
LHR10:30London Heathrow
22h 55m
1 stop
TRS10:25Trieste Ronchi dei Legionari
9 May
TRS19:15Trieste Ronchi dei Legionari
15h 25m
1 stop
LHR09:40London Heathrow
£150

Lufthansa flights from London Heathrow Airport to Trieste

Our best Lufthansa deals on London Heathrow Airport to Trieste flight tickets
Lufthansa
15 Mar
LHR08:30London Heathrow
4h 35m
1 stop
TRS14:05Trieste Ronchi dei Legionari
21 Mar
TRS06:25Trieste Ronchi dei Legionari
5h 20m
1 stop
LHR10:45London Heathrow
£165
Lufthansa
15 Mar
LHR06:30London Heathrow
6h 35m
1 stop
TRS14:05Trieste Ronchi dei Legionari
21 Mar
TRS06:25Trieste Ronchi dei Legionari
4h 20m
1 stop
LHR09:45London Heathrow
£166
Lufthansa
7 Mar
LHR08:30London Heathrow
4h 35m
1 stop
TRS14:05Trieste Ronchi dei Legionari
11 Mar
TRS14:40Trieste Ronchi dei Legionari
8h 40m
1 stop
LHR22:20London Heathrow
£168

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 February 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

Wed 1/7

16:30-18:30

1 stop25h 00m

Trieste Ronchi dei Legionari

Wed 22/7

11:15-09:40

1 stop23h 25m

£130

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 4/3

09:55-18:50

1 stop7h 55m

Trieste Ronchi dei Legionari

Mon 9/3

18:15-09:10

1 stop15h 55m

£145

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 4/5

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

Mon 11/5

15:15-09:40

1 stop19h 25m

£148

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 4/5

10:30-10:25

1 stop22h 55m

Trieste Ronchi dei Legionari

Sat 9/5

19:15-09:40

1 stop15h 25m

£150

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 3/6

10:30-22:55

1 stop11h 25m

Trieste Ronchi dei Legionari

Sun 7/6

15:15-09:40

1 stop19h 25m

£152

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 5/6

10:30-22:55

1 stop11h 25m

Trieste Ronchi dei Legionari

Wed 10/6

19:15-09:40

1 stop15h 25m

£158

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 6/5

10:30-22:55

1 stop11h 25m

Trieste Ronchi dei Legionari

Wed 20/5

19:15-09:40

1 stop15h 25m

£160

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 6/5

10:30-22:55

1 stop11h 25m

Trieste Ronchi dei Legionari

Wed 20/5

15:15-09:40

1 stop19h 25m

£160

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 13/6

10:30-14:30

1 stop27h 00m

Trieste Ronchi dei Legionari

Sun 21/6

11:15-09:40

1 stop23h 25m

£161

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 9/5

16:30-22:55

1 stop5h 25m

Trieste Ronchi dei Legionari

Wed 13/5

15:15-09:40

1 stop19h 25m

£162

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 £68. 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 £133.

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 £95. Flights to Trieste are more costly at midday, with an average ticket price of £117. Departure times at midday 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 64% 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 10m

Direct flights

None
The fastest flight from London Heathrow Airport to Trieste takes 4h 10m
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 10m, 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 £156Free CancellationRating
6.8
7,786 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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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
British Airways
Lufthansa
easyJet
KLM
Brussels Airlines