Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Trieste from £54

LHR — TRS
28 Sep — 5 Oct1
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

Fri 25/920:50 -
1 stop10h 15m
Tue 29/913:30 -
1 stop7h 35m
Deal found 27/8£131
Thu 3/1210:30 -
1 stop7h 00m
Mon 7/1219:15 -
1 stop15h 25m
Deal found 25/8£141
Fri 27/1116:30 -
1 stop25h 00m
Sun 29/1106:35 -
1 stop10h 05m
Deal found 28/8£144
Mon 23/1110:30 -
1 stop7h 00m
Wed 25/1106:35 -
1 stop10h 05m
Deal found 24/8£144
Wed 11/1110:30 -
1 stop7h 00m
Fri 13/1115:15 -
1 stop25h 25m
Deal found 25/8£147
Sun 22/1110:30 -
1 stop7h 00m
Wed 25/1111:15 -
1 stop5h 25m
Deal found 25/8£150
Thu 8/1009:30 -
1 stop11h 55m
Tue 13/1014:45 -
1 stop8h 25m
Deal found 27/8£153
Sat 26/915:30 -
1 stop5h 25m
Sat 3/1006:15 -
1 stop12h 25m
Deal found 26/8£153
Sun 11/1010:30 -
1 stop11h 25m
Sun 18/1006:10 -
1 stop11h 30m
Deal found 27/8£154
Sat 19/909:30 -
1 stop11h 25m
Sat 26/906:15 -
1 stop11h 25m
Deal found 25/8£156
Wed 23/911:30 -
1 stop9h 45m
Wed 30/914:40 -
1 stop5h 00m
Deal found 26/8£158

Find flight deals from Heathrow to Trieste

Round-trip from

£131

One-way from

£54

Popular in

December

Cheapest in

November

Average price

£172
25/9-29/9
  • 25/9-29/9
  • 2 total stops
  • 17h 50m total
  • London to Trieste
Search Deals
28/11
  • 28/11
  • 1 total stop
  • 8h 45m total
  • London to Trieste
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£9 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
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 London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Thu 3/12

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

Mon 7/12

19:15-09:40

1 stop15h 25m

£141

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Mon 5/10

08:30-22:15

1 stop12h 45m

Trieste Ronchi dei Legionari

Tue 13/10

14:45-20:45

2 stops7h 00m

£191

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Mon 23/11

10:30-10:25

1 stop22h 55m

Trieste Ronchi dei Legionari

Wed 25/11

15:15-07:40

2 stops17h 25m

£192

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Wed 9/9

09:30-22:15

1 stop11h 45m

Trieste Ronchi dei Legionari

Sun 13/9

06:10-17:40

1 stop12h 30m

£195

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Sun 13/9

08:30-22:15

1 stop12h 45m

Trieste Ronchi dei Legionari

Wed 16/9

14:40-20:45

2 stops7h 05m

£199

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Sat 10/10

09:30-21:55

1 stop11h 25m

Trieste Ronchi dei Legionari

Sun 11/10

06:10-17:40

1 stop12h 30m

£199
Fastest return journey

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Sun 27/9

16:30-22:55

1 stop5h 25m

Trieste Ronchi dei Legionari

Sun 4/10

06:35-15:40

1 stop10h 05m

£200

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Wed 16/9

11:30-22:15

1 stop9h 45m

Trieste Ronchi dei Legionari

Wed 23/9

06:35-15:40

1 stop10h 05m

£203

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Thu 8/10

10:50-22:25

2 stops10h 35m

Trieste Ronchi dei Legionari

Thu 15/10

14:40-20:45

2 stops7h 05m

£220

LondonTrieste

LHR London Heathrow - TRS Trieste Ronchi dei Legionari

LHRTRS

London Heathrow

Thu 8/10

10:50-22:25

2 stops10h 35m

Trieste Ronchi dei Legionari

Tue 20/10

06:20-12:50

2 stops7h 30m

£220

Flights are sorted by cheapest return flights first.

Deals found on 28/8

Showing 1-10 of 20 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

Reviews of airlines servicing Trieste

Check out reviews from past customers who have flown with 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.
Lufthansa
6.8
Okay
8,228 reviews
Check prices

Comfort

6.8

Overall

6.8

Boarding

7.0

Crew

7.6

Food

6.3

Entertainment

6.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2025

LHR - FRA

Cut open our bags and stole out items. Broke the locks
Lufthansa
6.8
Okay
8,228 reviews
Lufthansa
6.8
Okay
8,228 reviews
Check prices

Comfort

6.8

Overall

6.8

Boarding

7.0

Crew

7.6

Food

6.3

Entertainment

6.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2025

LHR - FRA

Cut open our bags and stole out items. Broke the locks

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 1 airline.

  • 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 7h. Fly via ITA Airways or Lufthansa to get the fastest option. Airlines will cover a distance of 744 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from London Heathrow Airport to Trieste round-trip?

    Flying on Lufthansa is currently your cheapest option to Trieste, with prices starting at £166.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Heathrow to Trieste

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£166Average£240FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Trieste?

Deals for Heathrow to Trieste flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Trieste?

Cheapflights helps you find that perfect flight to Trieste from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Trieste with no change fees?

Yes, we can. To see specific flights from Heathrow to Trieste with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Heathrow to Trieste become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.