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Cheap flights from Trieste to London from £21

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
TRS — LON
6 Sep — 13 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Trieste Ronchi dei Legionari to London are usually found in November or October, booked 21 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from Trieste to London

Enter your travel dates to find the best prices.

Cheapest flights from Trieste to London
Explore the most affordable flight options available from Trieste to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 August 2026.

Tue 15/922:15 -
Nonstop2h 10m
Sat 26/920:40 -
Nonstop2h 05m
Deal found 7/8£26
Thu 24/919:10 -
Nonstop2h 10m
Sat 3/1020:40 -
Nonstop2h 05m
Deal found 3/8£36
Tue 15/922:15 -
Nonstop2h 10m
Tue 29/918:45 -
Nonstop2h 05m
Deal found 5/8£42
Thu 17/919:10 -
Nonstop2h 10m
Fri 18/919:55 -
Nonstop2h 05m
Deal found 4/8£48
Thu 24/919:10 -
Nonstop2h 10m
Mon 28/913:25 -
Nonstop2h 05m
Deal found 3/8£50
Mon 5/1016:55 -
Nonstop2h 10m
Thu 8/1020:45 -
Nonstop2h 05m
Deal found 5/8£51
Sat 3/1008:30 -
1 stop10h 35m
Fri 9/1019:40 -
1 stop11h 25m
Deal found 6/8£85
Fri 18/906:10 -
1 stop13h 35m
Mon 21/908:25 -
1 stop13h 40m
Deal found 4/8£91
Thu 24/906:30 -
1 stop7h 30m
Mon 28/908:25 -
1 stop13h 40m
Deal found 4/8£94
Thu 26/1118:25 -
1 stop9h 25m
Mon 30/1119:45 -
1 stop13h 05m
Deal found 6/8£94
Thu 17/910:30 -
1 stop8h 35m
Fri 18/919:40 -
1 stop11h 25m
Deal found 4/8£95
Thu 17/910:30 -
1 stop8h 35m
Mon 21/909:00 -
1 stop13h 05m
Deal found 7/8£96

Find flight deals from Trieste to London

Discover tips and strategies to find the most affordable flight options for your journey from Trieste (TRS) to London (LON). 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 7 August 2026.

Round-trip from

£26

One-way from

£21

Popular in

January

Cheapest in

November

Average price

£122

Good one-way deal

£42 or less
Ryanair
  • Ryanair
  • 15/9-26/9
  • Nonstop
  • 4h 15m total
  • Trieste to London
Search Deals
Ryanair
  • Ryanair
  • 3/10
  • Nonstop
  • 2h 10m total
  • Trieste to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£13 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a one-way flight from Trieste Ronchi dei Legionari to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Trieste to London 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 7 August 2026.
Use the filters below to find and compare flights from Trieste to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

TriesteLondon

TRS Trieste Ronchi dei Legionari - STN London Stansted

TRSSTN

Trieste Ronchi dei Legionari

Tue 15/9

22:15-23:25

Nonstop2h 10m

London Stansted

Sat 26/9

20:40-23:45

Nonstop2h 05m

£42

TriesteLondon

TRS Trieste Ronchi dei Legionari - STN London Stansted

TRSSTN

Trieste Ronchi dei Legionari

Tue 15/9

22:15-23:25

Nonstop2h 10m

London Stansted

Tue 29/9

18:45-21:50

Nonstop2h 05m

£42

TriesteLondon

TRS Trieste Ronchi dei Legionari - STN London Stansted

TRSSTN

Trieste Ronchi dei Legionari

Thu 17/9

19:10-20:20

Nonstop2h 10m

London Stansted

Thu 24/9

20:45-23:50

Nonstop2h 05m

£67

TriesteLondon

TRS Trieste Ronchi dei Legionari - STN London Stansted

TRSSTN

Trieste Ronchi dei Legionari

Thu 10/9

19:10-20:20

Nonstop2h 10m

London Stansted

Mon 14/9

13:25-16:30

Nonstop2h 05m

£70

TriesteLondon

TRS Trieste Ronchi dei Legionari - STN London Stansted

TRSSTN

Trieste Ronchi dei Legionari

Fri 16/10

18:20-19:30

Nonstop2h 10m

London Stansted

Tue 20/10

18:45-21:50

Nonstop2h 05m

£74

TriesteLondon

TRS Trieste Ronchi dei Legionari - STN London Stansted

TRSSTN

Trieste Ronchi dei Legionari

Thu 24/9

10:30-19:20

1 stop9h 50m

London Stansted

Sat 3/10

20:40-23:45

Nonstop2h 05m

£79

TriesteLondon

TRS Trieste Ronchi dei Legionari - STN London Stansted

TRSSTN

Trieste Ronchi dei Legionari

Thu 17/9

19:10-20:20

Nonstop2h 10m

London Stansted

Mon 21/9

08:55-23:05

1 stop13h 10m

£82

TriesteLondon

TRS Trieste Ronchi dei Legionari - LTN London Luton

TRSLTN

Trieste Ronchi dei Legionari

Sat 3/10

08:30-18:05

1 stop10h 35m

London Luton

Fri 9/10

19:40-08:05

1 stop11h 25m

£97

TriesteLondon

TRS Trieste Ronchi dei Legionari - LTN London Luton

TRSLTN

Trieste Ronchi dei Legionari

Thu 17/9

10:30-18:05

1 stop8h 35m

London Luton

Mon 21/9

09:00-23:05

1 stop13h 05m

£104

TriesteLondon

TRS Trieste Ronchi dei Legionari - LTN London Luton

TRSLTN

Trieste Ronchi dei Legionari

Tue 15/9

18:35-12:45

2 stops19h 10m

London Luton

Tue 29/9

20:35-19:10

2 stops21h 35m

£109

Flights are sorted by cheapest return flights first.

Deals found on 5/8

Showing 1-10 of 60 resultsSorted by cheapest first
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3
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6

Best time to book a flight from Trieste to London

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

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

Currently, May is the cheapest month in which you can book a flight from Trieste to London (average of £49). Flying from Trieste to London in January is currently the most expensive (average of £154). 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 TRS to LON?

Find hourly flight availability from Trieste to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 August 2026.

It’s optimal to fly from Trieste to London in the morning. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight at midday.

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

Airfare is below average for this route at the moment.
Trieste to London flights typically cost between £102 and £140 in September.
The cheapest return price found within the last 5 days was £26 on Ryanair (15 Sept–26 Sept).

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

The price you pay for your flight from Trieste to London may vary depending on when you book. For the best chance of a lower fare, look to book 18 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 7 August 2026.
See what other customers who have flown with Ryanair from Trieste to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Ryanair
6.9
Okay
5,460 reviews
Check prices

Crew

7.5

Comfort

6.5

Entertainment

5.7

Overall

6.9

Boarding

6.7

Food

6.0

Reviews

1 / 20
8.0
Excellent

Nadine,Feb 2026

PSA - STN

The boarding process couldn't be more unpleasant really. We queue for half hour once we have arrived trhough the gate. They let us through the gates even though they have not opened the doors of the plane as yet. i feel like cattle. This time i decided not to bring any cabin luggage so that I could go through the gate last. Then I waited in the sun whilst everyone found their seats. At least 20 minutes. It was like torture. If i had a cabin bag - i would never have been able to put it above me, near my seat (which is always at the front) because the overhead cabin space would have been full. I need to work out a better strategy for next time or beg RyanAir and the cheaper airlines to work out a better boarding process. What do I do???
Ryanair
6.9
Okay
5,460 reviews
Ryanair
6.9
Okay
5,460 reviews
Check prices

Crew

7.5

Comfort

6.5

Entertainment

5.7

Overall

6.9

Boarding

6.7

Food

6.0

Reviews

1 / 20
8.0
Excellent

Nadine,Feb 2026

PSA - STN

The boarding process couldn't be more unpleasant really. We queue for half hour once we have arrived trhough the gate. They let us through the gates even though they have not opened the doors of the plane as yet. i feel like cattle. This time i decided not to bring any cabin luggage so that I could go through the gate last. Then I waited in the sun whilst everyone found their seats. At least 20 minutes. It was like torture. If i had a cabin bag - i would never have been able to put it above me, near my seat (which is always at the front) because the overhead cabin space would have been full. I need to work out a better strategy for next time or beg RyanAir and the cheaper airlines to work out a better boarding process. What do I do???

Related info for your journey

Find useful and relevant information for your journey from Trieste to London. 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 from for flights from Trieste to London?

    Most people fly from Trieste Ronchi dei Legionari (TRS) if they book a flight from Trieste to London. On average, Ronchi dei Legionari has 0 outbound flights to London per day from 0 airlines. Trieste Ronchi dei Legionari is conveniently located just 18.2 mi from Trieste’s city center.

  • How long is the flight from Trieste to London?

    A quick flight from Trieste to London can take about 2h 10m. Ryanair provides one of the quickest options available for as low as £26. Trieste and London are separated by a distance of 731 mi. Generally, flights for this route are direct.

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

    Most travelers choose Trieste Ronchi dei Legionari - London Heathrow, Trieste Ronchi dei Legionari - London Gatwick or Trieste Ronchi dei Legionari - London Stansted when deciding on the best route from Trieste to London.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Trieste to London 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 Trieste to London?

    Currently, May is the cheapest month in which you can book a flight from Trieste to London (average of £49). Flying from Trieste to London in January is currently the most expensive (average of £154). 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

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