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Cheap flights from London Heathrow Airport to Trieste from £61

LHR — TRS
12 Nov — 19 Nov1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Trieste

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Trieste

Sat 7/1109:55 -
1 stop8h 45m
Mon 9/1108:55 -
1 stop12h 10m
Deal found 9/10£139
Sat 14/1109:55 -
1 stop8h 45m
Mon 16/1108:55 -
1 stop12h 10m
Deal found 8/10£142
Sat 14/1116:30 -
1 stop5h 25m
Mon 23/1119:15 -
1 stop15h 25m
Deal found 13/10£144
Sat 14/1116:30 -
1 stop5h 25m
Sun 15/1115:15 -
1 stop19h 25m
Deal found 11/10£160
Sat 14/1116:30 -
1 stop16h 55m
Mon 16/1119:15 -
1 stop15h 25m
Deal found 8/10£163
Tue 10/1110:30 -
1 stop7h 00m
Wed 11/1115:15 -
1 stop19h 25m
Deal found 11/10£164

Find flight deals from Heathrow to Trieste

Round-trip from

£139

One-way from

£61

Popular in

August

Cheapest in

December

Average price

£76
7/11-9/11
  • 7/11-9/11
  • 2 total stops
  • 20h 55m total
  • London to Trieste
Search Deals
ITA Airways
  • ITA Airways
  • 4/3-31/12
  • 1 total stop
  • 5h 25m total
  • London to Trieste
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£27 potential increase over avg. return price).
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Cheapest flight prices on average. 7% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from London Heathrow Airport to Trieste that are best for you.

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Depart

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Cheapest return flight

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Sat 9/1

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£94

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Thu 3/12

16:30-22:55

1 stop5h 25m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£101

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Sun 8/11

09:15-07:40

2 stops21h 25m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£115

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Mon 9/11

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£120

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Mon 7/12

10:30-22:55

1 stop11h 25m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£126
Fastest return journey

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Fri 9/4

08:30-13:55

1 stop4h 25m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£136

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Sat 10/4

07:30-13:55

1 stop5h 25m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£136

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Wed 21/10

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£136

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Sat 5/12

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

Wed 31/12

00:00-00:00

Nonstop0h 00m

£137

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Sat 14/11

16:30-22:55

1 stop5h 25m

Trieste Ronchi dei Legionari

Mon 23/11

19:15-09:40

1 stop15h 25m

£144

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from Heathrow with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Trieste

What’s the top stopover airport for flights from London Heathrow Airport to Trieste?

Rome (FCO) – chosen by Cheapflights users on 50% of one-stop itineraries from London Heathrow Airport to Trieste on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Trieste?

Rome (FCO) is the most affordable one-stop option, with an average return flight price of £151.

What’s the fastest stopover option from London Heathrow Airport to Trieste?

Flights via Frankfurt am Main (FRA) have the shortest average one-way travel time for one-stop routes: 5h 15m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Trieste?

Flights via Frankfurt am Main (FRA) offer the fastest connection on this route, with an average stopover time of 2h 01m.

Reviews of airlines servicing Trieste

Check out reviews from past customers who have flown with ITA Airways and Lufthansa from London Heathrow Airport to Trieste to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
ITA Airways
6.8
Okay
1,392 reviews
Check prices

Boarding

7.0

Crew

7.4

Food

6.1

Comfort

6.7

Entertainment

6.3

Overall

6.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Sept 2026

JFK - FCO

Check in staff were very nice! No wait to check in. However, the flight was delayed and the cabin crew spoke English with heavy accents that were hard to understand. Unfortunately, the bathroom was dirty and smelled VERY bad! There was garbage and pee on the floor and nobody cleaned it up. Also, on the flight from Rome to Bari, the female flight attendant spoke so fast in English and Italian that it was impossible to understand anything that she said. Real mil would be preferable to powdered mil in the tea/coffee. Besides this, the plane was comfortable.
ITA Airways
6.8
Okay
1,392 reviews
ITA Airways
6.8
Okay
1,392 reviews
Check prices

Boarding

7.0

Crew

7.4

Food

6.1

Comfort

6.7

Entertainment

6.3

Overall

6.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Sept 2026

JFK - FCO

Check in staff were very nice! No wait to check in. However, the flight was delayed and the cabin crew spoke English with heavy accents that were hard to understand. Unfortunately, the bathroom was dirty and smelled VERY bad! There was garbage and pee on the floor and nobody cleaned it up. Also, on the flight from Rome to Bari, the female flight attendant spoke so fast in English and Italian that it was impossible to understand anything that she said. Real mil would be preferable to powdered mil in the tea/coffee. Besides this, the plane was comfortable.
Lufthansa
6.8
Okay
8,274 reviews
ITA Airways
6.8
Okay
1,392 reviews
Check prices

Boarding

7.0

Crew

7.4

Food

6.1

Comfort

6.7

Entertainment

6.3

Overall

6.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Sept 2026

JFK - FCO

Check in staff were very nice! No wait to check in. However, the flight was delayed and the cabin crew spoke English with heavy accents that were hard to understand. Unfortunately, the bathroom was dirty and smelled VERY bad! There was garbage and pee on the floor and nobody cleaned it up. Also, on the flight from Rome to Bari, the female flight attendant spoke so fast in English and Italian that it was impossible to understand anything that she said. Real mil would be preferable to powdered mil in the tea/coffee. Besides this, the plane was comfortable.

Related info for your journey

  • What airport do you fly into for flights to Trieste from London Heathrow?

    If you book a flight to Trieste from London Heathrow, you will be flying to Ronchi dei Legionari, which is the city’s only airport. Trieste Ronchi dei Legionari (TRS) is located 18.2 mi from the center of Trieste. There are 0 flights from London Heathrow to Ronchi dei Legionari per day from 2 different airlines.

  • How long is the flight from London Heathrow Airport to Trieste?

    There are many flights that can get you from London Heathrow Airport to Trieste in 5h 25m. Fly via ITA Airways to get the fastest option. Airlines will cover a distance of 744 mi.

  • What are the cheapest airlines flying from London Heathrow Airport to Trieste round-trip?

    Flying on ITA Airways is currently your cheapest option to Trieste, with prices starting at £78. Another option worth looking into is Lufthansa, starting at £170 return.

  • Can I find deals for flights from Heathrow to Trieste that include hotel bookings?

    Yes. In addition to deals on Heathrow to Trieste flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Trieste?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Trieste.

  • Can I find deals for business class flights from Heathrow to Trieste?

    Yes. Cheapflights offers flight deals from Heathrow to Trieste by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Trieste?

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

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Top 2 airlines flying from Heathrow to Trieste

AirlineCheapestAverageFlexibilityOn-time
ITA AirwaysCheapest£78Average£183FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
LufthansaCheapest£170Average£252FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

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