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Cheap flights from London Heathrow Airport to Trieste from £74

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — TRS
14 Nov — 21 Nov1
1 adult
1 adult, Economy

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 15 October 2025.

Sat 8/1109:55LHR - TRS
1 stop11h 50mMultiple Airlines
Mon 10/1118:15TRS - LHR
1 stop15h 55mMultiple Airlines
Deal found 14/10£136
Thu 27/1108:30LHR - TRS
1 stop4h 35mLufthansa
Thu 4/1214:50TRS - LHR
1 stop8h 30mLufthansa
Deal found 13/10£171
Thu 13/1115:30LHR - TRS
1 stop6h 10mLufthansa
Thu 20/1106:15TRS - LHR
1 stop5h 30mLufthansa
Deal found 14/10£172
Fri 31/1011:30LHR - TRS
1 stop10h 00mLufthansa
Sat 8/1115:00TRS - LHR
1 stop6h 50mLufthansa
Deal found 13/10£173
Sun 16/1106:30LHR - TRS
1 stop6h 35mLufthansa
Sat 22/1106:25TRS - LHR
1 stop4h 20mLufthansa
Deal found 14/10£175
Fri 28/1120:15LHR - TRS
2 stops16h 50mLufthansa
Fri 5/1215:00TRS - LHR
1 stop4h 45mLufthansa
Deal found 14/10£194
Mon 10/1116:30LHR - TRS
1 stop4h 55mLufthansa
Mon 17/1114:40TRS - LHR
1 stop8h 40mLufthansa
Deal found 13/10£204

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 15 October 2025.

Round-trip from

£139

One-way from

£74

Popular in

January

Cheapest in

September

Average price

£278
8/11-10/11
  • 8/11-10/11
  • 2 total stops
  • 27h 45m total
  • London to Trieste
Search Deals
1/12
  • 1/12
  • 1 total stop
  • 11h 55m total
  • London to Trieste
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£32 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 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 15 October 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

Thu 27/11

07:30-14:05

1 stop5h 35m

Trieste Ronchi dei Legionari

Thu 4/12

14:50-18:45

1 stop4h 55m

£174

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 28/11

15:30-22:30

1 stop6h 00m

Trieste Ronchi dei Legionari

Fri 5/12

15:00-20:50

1 stop6h 50m

£175

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sun 16/11

06:30-14:05

1 stop6h 35m

Trieste Ronchi dei Legionari

Sat 22/11

06:25-09:45

1 stop4h 20m

£175

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Thu 13/11

13:50-22:40

2 stops7h 50m

Trieste Ronchi dei Legionari

Thu 20/11

06:15-09:45

1 stop4h 30m

£187

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Tue 2/12

20:15-14:00

2 stops16h 45m

Trieste Ronchi dei Legionari

Tue 9/12

06:15-12:50

1 stop7h 35m

£194

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 1/12

10:30-22:25

1 stop10h 55m

Trieste Ronchi dei Legionari

Tue 9/12

06:15-13:00

2 stops7h 45m

£196

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Sat 14/3

20:15-14:05

2 stops16h 50m

Trieste Ronchi dei Legionari

Sat 21/3

06:25-17:45

1 stop12h 20m

£197

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 31/10

17:30-22:30

1 stop4h 00m

Trieste Ronchi dei Legionari

Sat 8/11

06:25-13:00

2 stops7h 35m

£198

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Fri 13/3

06:30-14:05

1 stop6h 35m

Trieste Ronchi dei Legionari

Sun 15/3

15:00-21:00

2 stops7h 00m

£200

LondonTrieste

LHR - TRS

LHRTRS

London Heathrow

Mon 1/12

09:55-22:50

1 stop11h 55m

£74

Flights are sorted by cheapest return flights first.

Deals found on 13/10

Showing 1-10 of 18 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Trieste (average of £58). Flying from London Heathrow Airport to Trieste in August is currently the most expensive (average of £146). 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.

How much does it cost for a return flight from London Heathrow Airport to Trieste?

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 15 October 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
7,489 reviews
Check prices

Food

6.3

Entertainment

6.4

Boarding

7.0

Crew

7.6

Comfort

6.8

Overall

6.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

BHX - FRA

Not as good as when I traveled many years ago. My main problem was missing my flight from Frankfurt to Birmingham because of very late start from LA and was told delay wil be made up but then I had to wait 5 hours for my next booked fight . Asian vegetarian food was skimpy and horrible.
Lufthansa
6.8
Okay
7,489 reviews
Lufthansa
6.8
Okay
7,489 reviews
Check prices

Food

6.3

Entertainment

6.4

Boarding

7.0

Crew

7.6

Comfort

6.8

Overall

6.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

BHX - FRA

Not as good as when I traveled many years ago. My main problem was missing my flight from Frankfurt to Birmingham because of very late start from LA and was told delay wil be made up but then I had to wait 5 hours for my next booked fight . Asian vegetarian food was skimpy and horrible.

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 5h 35m. Fly via Lufthansa 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 £151. 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Trieste (average of £58). Flying from London Heathrow Airport to Trieste in August is currently the most expensive (average of £146). 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 15 October 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£151Average£241FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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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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