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Cheap flights from London Heathrow Airport to Trieste from £70

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 16/4. 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
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
10:30 - 18:30
LHR
-
TRS
7h 00m
1 stop
ITA Airways Logo
19:15 - 15:40
TRS
-
LHR
21h 25m
1 stop
£124ITA Airways
mar., 21 abr. - mar., 28 abr.
ITA Airways Logo
16:30 - 18:30
LHR
-
TRS
25h 00m
1 stop
ITA Airways Logo
15:15 - 15:40
TRS
-
LHR
25h 25m
1 stop
£136ITA Airways
mié., 15 abr. - lun., 20 abr.
ITA Airways Logo
16:30 - 10:25
LHR
-
TRS
16h 55m
1 stop
ITA Airways Logo
19:15 - 15:40
TRS
-
LHR
21h 25m
1 stop
£138ITA Airways
mié., 15 abr. - lun., 20 abr.
Multiple Airlines Logo
20:50 - 08:05
LHR
-
TRS
10h 15m
1 stop
Multiple Airlines Logo
13:30 - 20:05
TRS
-
LHR
7h 35m
1 stop
£139Multiple Airlines
vie., 17 abr. - mar., 21 abr.
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
£142ITA Airways
dom., 12 abr. - dom., 26 abr.
ITA Airways Logo
16:30 - 22:55
LHR
-
TRS
5h 25m
1 stop
ITA Airways Logo
11:15 - 15:40
TRS
-
LHR
5h 25m
1 stop
£144ITA Airways
jue., 16 abr. - mar., 21 abr.
ITA Airways Logo
16:30 - 10:25
LHR
-
TRS
16h 55m
1 stop
ITA Airways Logo
11:15 - 15:40
TRS
-
LHR
5h 25m
1 stop
£148ITA Airways
mié., 15 abr. - mié., 22 abr.
ITA Airways Logo
16:30 - 22:55
LHR
-
TRS
5h 25m
1 stop
ITA Airways Logo
11:15 - 15:40
TRS
-
LHR
5h 25m
1 stop
£150ITA Airways
mié., 22 abr. - mié., 29 abr.
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
£151ITA Airways
vie., 10 abr. - mar., 14 abr.
ITA Airways Logo
16:30 - 10:25
LHR
-
TRS
16h 55m
1 stop
ITA Airways Logo
19:15 - 09:40
TRS
-
LHR
15h 25m
1 stop
£151ITA Airways
vie., 10 abr. - mar., 14 abr.

ITA Airways flights from London Heathrow Airport to Trieste

Our best ITA Airways deals on London Heathrow Airport to Trieste flight tickets
ITA Airways
21 Apr
LHR10:30London Heathrow
7h 00m
1 stop
TRS18:30Trieste Ronchi dei Legionari
28 Apr
TRS19:15Trieste Ronchi dei Legionari
21h 25m
1 stop
LHR15:40London Heathrow
£124
ITA Airways
15 Apr
LHR16:30London Heathrow
25h 00m
1 stop
TRS18:30Trieste Ronchi dei Legionari
20 Apr
TRS15:15Trieste Ronchi dei Legionari
25h 25m
1 stop
LHR15:40London Heathrow
£136
ITA Airways
15 Apr
LHR16:30London Heathrow
16h 55m
1 stop
TRS10:25Trieste Ronchi dei Legionari
20 Apr
TRS19:15Trieste Ronchi dei Legionari
21h 25m
1 stop
LHR15:40London Heathrow
£138

Lufthansa flights from London Heathrow Airport to Trieste

Our best Lufthansa deals on London Heathrow Airport to Trieste flight tickets
Lufthansa
19 Jun
LHR07:30London Heathrow
13h 45m
1 stop
TRS22:15Trieste Ronchi dei Legionari
24 Jun
TRS06:10Trieste Ronchi dei Legionari
11h 30m
1 stop
LHR16:40London Heathrow
£153
Lufthansa
17 Apr
LHR07:30London Heathrow
13h 45m
1 stop
TRS22:15Trieste Ronchi dei Legionari
19 Apr
TRS06:10Trieste Ronchi dei Legionari
11h 30m
1 stop
LHR16:40London Heathrow
£170
Lufthansa
19 Mar
LHR08:30London Heathrow
4h 35m
1 stop
TRS14:05Trieste Ronchi dei Legionari
24 Mar
TRS14:40Trieste Ronchi dei Legionari
5h 05m
1 stop
LHR18:45London Heathrow
£171

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 8 marzo 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 return flight

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

mar. 21/4

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

mar. 28/4

19:15-15:40

1 stop21h 25m

£124

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

mié. 15/4

16:30-18:30

1 stop25h 00m

Trieste Ronchi dei Legionari

lun. 20/4

15:15-15:40

1 stop25h 25m

£136

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

mié. 15/4

16:30-10:25

1 stop16h 55m

Trieste Ronchi dei Legionari

lun. 20/4

19:15-15:40

1 stop21h 25m

£138

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

vie. 17/4

20:50-08:05

1 stop10h 15m

Trieste Ronchi dei Legionari

mar. 21/4

13:30-20:05

1 stop7h 35m

£139

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

dom. 12/4

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

dom. 26/4

15:15-09:40

1 stop19h 25m

£142
Fastest return journey

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

jue. 16/4

16:30-22:55

1 stop5h 25m

Trieste Ronchi dei Legionari

mar. 21/4

11:15-15:40

1 stop5h 25m

£144

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

mié. 15/4

16:30-10:25

1 stop16h 55m

Trieste Ronchi dei Legionari

mié. 22/4

11:15-15:40

1 stop5h 25m

£148

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

mié. 22/4

16:30-22:55

1 stop5h 25m

Trieste Ronchi dei Legionari

mié. 29/4

11:15-15:40

1 stop5h 25m

£150

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

vie. 10/4

16:30-18:30

1 stop25h 00m

Trieste Ronchi dei Legionari

mar. 14/4

11:15-09:40

1 stop23h 25m

£151

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

vie. 10/4

16:30-10:25

1 stop16h 55m

Trieste Ronchi dei Legionari

mar. 14/4

19:15-09:40

1 stop15h 25m

£151

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 £69. 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 £98. Flights to Trieste are more costly at midday, with an average ticket price of £122. 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 1% 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

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.
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 5h 25m, 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 £158Free CancellationRating
6.8
7,835 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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mar. 7/4
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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