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Cheap flights from London Heathrow Airport to Trieste from £66

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 23/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — TRS
12 Feb — 19 Feb1
1 adult
1 adult, Economy, 0 bags

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 13 January 2026.

Round-trip from

£116

One-way from

£66

Popular in

August

Cheapest in

November

Average price

£140
ITA Airways
  • ITA Airways
  • 16/5-24/5
  • 2 total stops
  • 30h 50m total
  • London to Trieste
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23/2
  • 23/2
  • 1 total stop
  • 11h 55m total
  • London to Trieste
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£24 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (£6 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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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 13 January 2026.

Wed 23/910:30
LHR
-
TRS
1 stop22h 55m
ITA Airways
Mon 28/919:15
TRS
-
LHR
1 stop15h 25m
ITA Airways
Deal found 11/1£108
Fri 4/910:30
LHR
-
TRS
1 stop11h 25m
ITA Airways
Fri 18/915:15
TRS
-
LHR
1 stop19h 25m
ITA Airways
Deal found 11/1£115
Sat 16/510:30
LHR
-
TRS
1 stop11h 25m
ITA Airways
Sun 24/515:15
TRS
-
LHR
1 stop19h 25m
ITA Airways
Deal found 10/1£116
Fri 4/910:30
LHR
-
TRS
1 stop11h 25m
ITA Airways
Tue 8/911:15
TRS
-
LHR
1 stop23h 25m
ITA Airways
Deal found 12/1£117
Fri 18/910:30
LHR
-
TRS
1 stop11h 25m
ITA Airways
Tue 22/911:15
TRS
-
LHR
1 stop23h 25m
ITA Airways
Deal found 12/1£120
Fri 5/610:30
LHR
-
TRS
1 stop22h 55m
ITA Airways
Sun 7/615:15
TRS
-
LHR
1 stop19h 25m
ITA Airways
Deal found 11/1£129
Thu 23/416:30
LHR
-
TRS
1 stop16h 55m
ITA Airways
Sun 26/415:15
TRS
-
LHR
1 stop19h 25m
ITA Airways
Deal found 10/1£129
Thu 23/416:30
LHR
-
TRS
1 stop5h 25m
ITA Airways
Thu 7/519:15
TRS
-
LHR
1 stop15h 25m
ITA Airways
Deal found 10/1£135
Wed 6/516:30
LHR
-
TRS
1 stop5h 25m
ITA Airways
Wed 20/515:15
TRS
-
LHR
1 stop19h 25m
ITA Airways
Deal found 10/1£137
Wed 25/209:55
LHR
-
TRS
1 stop7h 55m
Multiple Airlines
Wed 4/319:20
TRS
-
LHR
1 stop14h 50m
Multiple Airlines
Deal found 10/1£141
Wed 4/209:55
LHR
-
TRS
1 stop7h 55m
Multiple Airlines
Sun 8/221:05
TRS
-
LHR
1 stop12h 00m
Multiple Airlines
Deal found 10/1£144
Tue 1/916:30
LHR
-
TRS
1 stop16h 55m
ITA Airways
Fri 4/919:15
TRS
-
LHR
1 stop15h 25m
ITA Airways
Deal found 12/1£146

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 13 January 2026.
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

Fri 5/6

10:30-10:25

1 stop22h 55m

Trieste Ronchi dei Legionari

Sun 7/6

15:15-09:40

1 stop19h 25m

£129

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 23/4

16:30-10:25

1 stop16h 55m

Trieste Ronchi dei Legionari

Sun 26/4

15:15-09:40

1 stop19h 25m

£129

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Wed 25/2

09:55-18:50

1 stop7h 55m

Trieste Ronchi dei Legionari

Wed 4/3

19:20-09:10

1 stop14h 50m

£141

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 7/6

10:30-10:25

1 stop22h 55m

Trieste Ronchi dei Legionari

Fri 19/6

15:15-09:40

1 stop19h 25m

£154

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Tue 24/2

08:30-14:00

1 stop4h 30m

Trieste Ronchi dei Legionari

Tue 3/3

06:15-15:50

1 stop10h 35m

£161

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 6/3

17:30-22:30

1 stop4h 00m

Trieste Ronchi dei Legionari

Mon 9/3

14:40-22:20

1 stop8h 40m

£164

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 12/2

16:30-22:40

1 stop5h 10m

Trieste Ronchi dei Legionari

Tue 17/2

14:40-20:50

1 stop7h 10m

£165

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 1/2

06:30-14:05

1 stop6h 35m

Trieste Ronchi dei Legionari

Thu 12/2

06:15-09:45

1 stop4h 30m

£165

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 17/4

06:30-13:55

1 stop6h 25m

Trieste Ronchi dei Legionari

Sun 19/4

06:00-17:40

1 stop12h 40m

£169

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 23/2

09:55-22:50

1 stop11h 55m

£66

Flights are sorted by cheapest return flights first.

Deals found on 12/1

Showing 1-10 of 19 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Trieste (average of £65). Flying from London Heathrow Airport to Trieste in August is currently the most expensive (average of £144). 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 13 January 2026.
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
7,709 reviews
Check prices

Boarding

7.0

Comfort

6.8

Entertainment

6.4

Food

6.3

Overall

6.8

Crew

7.6

Reviews

1 / 20
4.0
Okay

Djermouli,Dec 2025

FRA - SFO

I’m sorry the worst airline united food sales I’m diabetic plus high cholesterol pls seats it’s not comfortable plus screen tv broke I try to charge my phone don’t work I’m not flying with united airlines
Lufthansa
6.8
Okay
7,709 reviews
Lufthansa
6.8
Okay
7,709 reviews
Check prices

Boarding

7.0

Comfort

6.8

Entertainment

6.4

Food

6.3

Overall

6.8

Crew

7.6

Reviews

1 / 20
4.0
Okay

Djermouli,Dec 2025

FRA - SFO

I’m sorry the worst airline united food sales I’m diabetic plus high cholesterol pls seats it’s not comfortable plus screen tv broke I try to charge my phone don’t work I’m not flying with united airlines

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 £156.

  • 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Trieste (average of £65). Flying from London Heathrow Airport to Trieste in August is currently the most expensive (average of £144). 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 13 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£156Average£238FlexibilityNo 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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