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Cheap flights from London to Trieste from £17

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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — TRS
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Trieste Ronchi dei Legionari are usually found in November or October, booked 13 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from London to Trieste

Enter your travel dates to find the best prices.

Cheapest flights from London to Trieste
Explore the most affordable flight options available from London to Trieste. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.

Sat 20/1214:00STN - TRS
Nonstop2h 05mRyanair
Mon 22/1220:55TRS - STN
Nonstop2h 05mRyanair
Deal found 10/12£155
Thu 11/1218:10STN - TRS
Nonstop2h 05mRyanair
Mon 15/1216:55TRS - STN
1 stop15h 20mRyanair
Deal found 11/12£160
Thu 11/1218:10STN - TRS
Nonstop2h 05mRyanair
Sat 13/1215:25TRS - STN
1 stop6h 20mRyanair
Deal found 10/12£170
Thu 11/1206:00STN - TRS
3 stops36h 05mMultiple Airlines
Sat 13/1215:25TRS - STN
1 stop6h 20mMultiple Airlines
Deal found 10/12£198
Thu 11/1213:15LCY - TRS
1 stop6h 55mITA Airways
Mon 15/1219:15TRS - LCY
1 stop21h 55mITA Airways
Deal found 11/12£203
Thu 11/1213:15LCY - TRS
1 stop22h 05mITA Airways
Sat 13/1219:15TRS - LCY
1 stop21h 55mITA Airways
Deal found 10/12£204
Sat 20/1216:05LTN - TRS
2 stops26h 15mMultiple Airlines
Mon 22/1216:55TRS - LTN
2 stops26h 05mMultiple Airlines
Deal found 10/12£208
Sat 20/1220:00LGW - TRS
2 stops22h 20mMultiple Airlines
Mon 22/1216:55TRS - LGW
2 stops23h 45mMultiple Airlines
Deal found 10/12£214
Thu 11/1219:30LTN - TRS
2 stops22h 35mMultiple Airlines
Thu 18/1217:00TRS - LTN
2 stops24h 40mMultiple Airlines
Deal found 11/12£236
Sat 20/1216:05LTN - TRS
2 stops26h 15mRyanair
Mon 22/1221:30TRS - LTN
1 stop14h 10mRyanair
Deal found 10/12£237
Sat 20/1220:10LGW - TRS
1 stop23h 30mMultiple Airlines
Wed 31/1206:00TRS - LGW
1 stop16h 25mMultiple Airlines
Deal found 11/12£265
Thu 11/1219:05LGW - TRS
1 stop23h 00mMultiple Airlines
Mon 15/1212:20TRS - LGW
1 stop7h 15mMultiple Airlines
Deal found 11/12£273

Find flight deals from London to Trieste

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 12 December 2025.

Round-trip from

£33

One-way from

£17

Popular in

December

Cheapest in

November

Average price

£205

Good round-trip deal

£41 or less

Good one-way deal

£56 or less
Ryanair
  • Ryanair
  • 15/1-18/1
  • Nonstop
  • 4h 10m total
  • London to Trieste
Search Deals
Ryanair
  • Ryanair
  • 8/1
  • Nonstop
  • 2h 05m total
  • London to Trieste
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£3 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Trieste Ronchi dei Legionari.
Search Deals
Price to beat on a one-way flight from London (LON) to Trieste Ronchi dei Legionari.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 12 December 2025.
Use the filters below to find and compare flights from London to Trieste that are best for you.

Fly from

London

Fly to

Trieste

Route

Depart

Return

Price

LondonTrieste

STN - TRS

STNTRS

London Stansted

Thu 15/1

18:10-21:15

Nonstop2h 05m

Trieste Ronchi dei Legionari

Sun 18/1

10:15-11:20

Nonstop2h 05m

£33

LondonTrieste

STN - TRS

STNTRS

London Stansted

Sun 11/1

10:15-20:40

1 stop9h 25m

Trieste Ronchi dei Legionari

Thu 22/1

21:40-22:45

Nonstop2h 05m

£62

LondonTrieste

STN - TRS

STNTRS

London Stansted

Mon 26/1

13:55-22:50

1 stop7h 55m

Trieste Ronchi dei Legionari

Mon 2/2

20:55-22:00

Nonstop2h 05m

£67

LondonTrieste

LTN - TRS

LTNTRS

London Luton

Sat 24/1

05:25-12:10

1 stop5h 45m

Trieste Ronchi dei Legionari

Sat 31/1

12:45-02:55

1 stop15h 10m

£77

LondonTrieste

STN - TRS

STNTRS

London Stansted

Sat 17/1

14:20-22:45

1 stop7h 25m

Trieste Ronchi dei Legionari

Mon 19/1

12:20-19:25

1 stop8h 05m

£83

LondonTrieste

LTN - TRS

LTNTRS

London Luton

Mon 26/1

08:25-16:30

1 stop7h 05m

Trieste Ronchi dei Legionari

Mon 2/2

16:55-07:40

1 stop15h 45m

£87

LondonTrieste

LTN - TRS

LTNTRS

London Luton

Sat 24/1

09:20-22:45

1 stop12h 25m

Trieste Ronchi dei Legionari

Sat 31/1

13:30-23:00

1 stop10h 30m

£87

LondonTrieste

LGW - TRS

LGWTRS

London Gatwick

Mon 26/1

16:00-22:50

1 stop5h 50m

Trieste Ronchi dei Legionari

Mon 2/2

12:20-18:35

1 stop7h 15m

£96

LondonTrieste

LTN - TRS

LTNTRS

London Luton

Sun 11/1

13:10-20:40

1 stop6h 30m

Trieste Ronchi dei Legionari

Thu 22/1

21:50-13:00

2 stops16h 10m

£97

LondonTrieste

LGW - TRS

LGWTRS

London Gatwick

Sat 24/1

06:50-22:45

1 stop14h 55m

Trieste Ronchi dei Legionari

Sat 31/1

18:10-09:00

1 stop15h 50m

£102

Flights are sorted by cheapest return flights first.

Deals found on 12/12

Showing 1-10 of 60 results
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Best time to book a flight from London to Trieste

Have a flexible travel schedule? Discover the best time to fly to Trieste from London 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 to Trieste

How far ahead should I book a flight from London to Trieste?

Use this chart to determine the optimal time to book a return flight from London to Trieste. Price data was last updated on 5 December 2025.

The price you pay for your flight from London to Trieste may vary depending on when you book. For the best chance of a lower fare, look to book 13 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, December is the cheapest month in which you can book a flight from London to Trieste (average of £16). Flying from London to Trieste in August is currently the most expensive (average of £75). 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.

What is the cheapest time of day to fly from LON to TRS?

Find hourly flight availability from London to Trieste. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.

It’s typically best to fly out from London to Trieste at midday. Doing so could potentially save you 51% on the flight price compared to flying in the afternoon, which is usually more expensive.

How much does it cost for a return flight from London 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 12 December 2025.
Get a feel of what it's like to fly with Ryanair, Lufthansa, andITA Airways from London to Trieste by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Ryanair
6.8
Okay
5,218 reviews
Check prices

Food

6.0

Comfort

6.5

Crew

7.5

Boarding

6.7

Entertainment

5.6

Overall

6.8

Reviews

1 / 20
2.0
Mediocre

brendan,Sept 2025

MAN - NTE

It would have been better if I had a flown with Ryanair but I was ill and warm be coming back on the return flight
Ryanair
6.8
Okay
5,218 reviews
Ryanair
6.8
Okay
5,218 reviews
Check prices

Food

6.0

Comfort

6.5

Crew

7.5

Boarding

6.7

Entertainment

5.6

Overall

6.8

Reviews

1 / 20
2.0
Mediocre

brendan,Sept 2025

MAN - NTE

It would have been better if I had a flown with Ryanair but I was ill and warm be coming back on the return flight
Lufthansa
6.8
Okay
7,626 reviews
Ryanair
6.8
Okay
5,218 reviews
Check prices

Food

6.0

Comfort

6.5

Crew

7.5

Boarding

6.7

Entertainment

5.6

Overall

6.8

Reviews

1 / 20
2.0
Mediocre

brendan,Sept 2025

MAN - NTE

It would have been better if I had a flown with Ryanair but I was ill and warm be coming back on the return flight
ITA Airways
6.7
Okay
1,102 reviews
Ryanair
6.8
Okay
5,218 reviews
Check prices

Food

6.0

Comfort

6.5

Crew

7.5

Boarding

6.7

Entertainment

5.6

Overall

6.8

Reviews

1 / 20
2.0
Mediocre

brendan,Sept 2025

MAN - NTE

It would have been better if I had a flown with Ryanair but I was ill and warm be coming back on the return flight
British Airways
6.7
Okay
7,571 reviews
Ryanair
6.8
Okay
5,218 reviews
Check prices

Food

6.0

Comfort

6.5

Crew

7.5

Boarding

6.7

Entertainment

5.6

Overall

6.8

Reviews

1 / 20
2.0
Mediocre

brendan,Sept 2025

MAN - NTE

It would have been better if I had a flown with Ryanair but I was ill and warm be coming back on the return flight

Related info for your journey

Find useful and relevant information for your journey from London 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?

    If you book a flight to Trieste from London, 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 to Ronchi dei Legionari per day from 3 different airlines.

  • How long is the flight from London to Trieste?

    Ryanair and ITA Airways can get you from London to Trieste in just under 2h 05m. Your travel time can differ by up to 4h 55m. Airlines will cover a distance of 731 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from London to Trieste round-trip from £30. Other airlines that can offer you cheap pricing are ITA Airways, from £138, and Lufthansa, from £150. Ryanair is 75% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most popular routes from London to Trieste?

    While some choose either London Gatwick - Trieste Ronchi dei Legionari or London City - Trieste Ronchi dei Legionari, London Heathrow - Trieste Ronchi dei Legionari is the most popular route from London to Trieste.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 to Trieste?

    Currently, December is the cheapest month in which you can book a flight from London to Trieste (average of £16). Flying from London to Trieste in August is currently the most expensive (average of £75). 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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Alternative routes for London to Trieste

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Top 3 airlines flying from London to Trieste

Discover the top 3 airlines that operate flights from London 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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£30Average£96FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
ITA AirwaysCheapest£138Average£207FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
LufthansaCheapest£150Average£240FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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

Cheapflights makes it easy to find London to Trieste flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights simply makes it quick and affordable to book flights from London to Trieste by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Trieste flexibly with Cheapflights today.

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

Yes, Cheapflights offers price alerts on London to Trieste flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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