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Cheap flights from London Heathrow Airport to Trieste from £61

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — TRS
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Heathrow to Trieste

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Trieste
Explore the most affordable flight options available from Heathrow to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 November 2025.

Thu 4/1208:30LHR - TRS
1 stop4h 35mLufthansa
Sat 13/1206:25TRS - LHR
1 stop10h 25mLufthansa
Deal found 25/11£198
Tue 2/1219:30LHR - TRS
1 stop17h 30mLufthansa
Sat 6/1215:00TRS - LHR
1 stop4h 45mLufthansa
Deal found 25/11£236
Mon 24/1120:30LHR - TRS
1 stop15h 50mMultiple Airlines
Fri 28/1120:30TRS - LHR
1 stop12h 35mMultiple Airlines
Deal found 24/11£240
Mon 1/1220:30LHR - TRS
1 stop15h 50mMultiple Airlines
Wed 3/1219:20TRS - LHR
1 stop14h 50mMultiple Airlines
Deal found 24/11£255
Tue 2/1211:05LHR - TRS
2 stops9h 05mMultiple Airlines
Sat 6/1215:00TRS - LHR
1 stop4h 45mMultiple Airlines
Deal found 25/11£282
Sun 14/1207:30LHR - TRS
1 stop5h 35mLufthansa
Mon 15/1206:35TRS - LHR
2 stops10h 15mLufthansa
Deal found 25/11£315
Wed 26/1112:15LHR - TRS
2 stops18h 20mMultiple Airlines
Thu 27/1111:10TRS - LHR
1 stop7h 50mMultiple Airlines
Deal found 25/11£317
Mon 24/1116:30LHR - TRS
1 stop4h 55mLufthansa
Fri 28/1106:25TRS - LHR
1 stop4h 20mLufthansa
Deal found 24/11£345
Thu 27/1120:30LHR - TRS
3 stops14h 50mMultiple Airlines
Sat 29/1113:30TRS - LHR
1 stop6h 55mMultiple Airlines
Deal found 26/11£347

Cheap flight deals from Heathrow to Trieste

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Trieste (TRS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 November 2025.

Round-trip from

£108

One-way from

£61

Popular in

January

Cheapest in

September

Average price

£47
ITA Airways
  • ITA Airways
  • 8/5-10/5
  • 2 total stops
  • 26h 50m total
  • London to Trieste
Search Deals
4/3
  • 4/3
  • 1 total stop
  • 12h 50m total
  • London to Trieste
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£44 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 27 November 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Trieste that are best for you.

Fly from

Heathrow

Fly to

Trieste

Route

Depart

Return

Price

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Tue 5/5

10:30-10:25

1 stop22h 55m

Trieste Ronchi dei Legionari

Tue 12/5

19:15-09:40

1 stop15h 25m

£111

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 7/5

10:30-22:55

1 stop11h 25m

Trieste Ronchi dei Legionari

Sun 10/5

19:15-09:40

1 stop15h 25m

£111

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

£113

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Tue 21/4

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

Tue 12/5

19:15-09:40

1 stop15h 25m

£115

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 6/5

10:30-18:30

1 stop7h 00m

Trieste Ronchi dei Legionari

Wed 20/5

19:15-09:40

1 stop15h 25m

£135

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 15/1

20:50-19:55

2 stops22h 05m

Trieste Ronchi dei Legionari

Sun 18/1

06:10-20:05

2 stops14h 55m

£158

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 15/1

08:30-14:10

1 stop4h 40m

Trieste Ronchi dei Legionari

Sun 18/1

15:00-22:20

1 stop8h 20m

£164

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 8/1

08:30-14:10

1 stop4h 40m

Trieste Ronchi dei Legionari

Thu 15/1

06:15-15:50

1 stop10h 35m

£166

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 9/1

16:30-22:30

1 stop5h 00m

Trieste Ronchi dei Legionari

Sun 11/1

15:00-18:45

1 stop4h 45m

£170

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 12/1

09:55-22:50

1 stop11h 55m

£67

Flights are sorted by cheapest return flights first.

Deals found on 24/11

Showing 1-10 of 20 results
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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from London Heathrow Airport to Trieste?

Currently, December is the cheapest month in which you can book a flight from London Heathrow Airport to Trieste (average of £16). Flying from London Heathrow Airport to Trieste in August is currently the most expensive (average of £147). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Trieste

Get insights into the airlines that provide service to Trieste. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Trieste. Reviews last updated 27 November 2025.
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
7,594 reviews
Check prices

Comfort

6.8

Food

6.3

Entertainment

6.4

Overall

6.8

Boarding

7.0

Crew

7.6

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
7,594 reviews
Lufthansa
6.8
Okay
7,594 reviews
Check prices

Comfort

6.8

Food

6.3

Entertainment

6.4

Overall

6.8

Boarding

7.0

Crew

7.6

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

Find useful and relevant information for your journey from Heathrow to Trieste. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 22h 55m. Fly via ITA Airways to get the fastest option. Airlines will cover a distance of 744 mi.

  • 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 £152. This flight start at 39% lower than the current average price 3 months from now.

  • 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.

  • What is the cheapest month to book a flight from London Heathrow Airport to Trieste?

    Currently, December is the cheapest month in which you can book a flight from London Heathrow Airport to Trieste (average of £16). Flying from London Heathrow Airport to Trieste in August is currently the most expensive (average of £147). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 airline flying from Heathrow to Trieste

Discover the top airline that operate flights from Heathrow to Trieste. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 27 November 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£152Average£244FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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!

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