Flights to Dublin from the UK 2026: Cheapest Airlines & Booking Tips

The cheapest flights to Dublin from the UK in 2026 are on Ryanair, which runs the most flights on the route (around 396 per week) with off-peak returns from as little as £17-£30 hand-luggage only — closely followed by Aer Lingus, with British Airways and easyJet also flying. Dublin is one of the busiest and most competitive short-haul routes from the UK, served from a large number of airports, so almost every UK traveller has a cheap direct flight from a local airport.

One thing to get right before you book: the Common Travel Area means British and Irish citizens don't legally need a passport to travel between the UK and Ireland — but every airline still requires accepted photo ID, and in practice a passport is the one document they all accept. This guide covers that in full, plus the airline comparison, price bands by month, and the booking window that keeps a return under £40. For the official destination view, Visit Dublin is the tourism board's site, and the UK government's Ireland travel advice covers the details. Already planning where to stay? Our best Dublin hotels 2026 guide covers real, bookable stays from Georgian icons to budget rooms from £103.

Jump to: Quick answers · Do you need a passport? · Airline comparison · UK airport comparison · Price bands by month · St Patrick's & event dates · Baggage compared · Booking windows · Airport to the city · Common mistakes · How to search · FAQ

Quick answers

What's the cheapest airline to Dublin? Ryanair — most flights on the route and the lowest headline fares (from ~£17-£30 off-peak), with Aer Lingus a close second. BA and easyJet also fly.

How long is the flight? About 1 hour to 1 hour 30 minutes — roughly 1h20 from London, around an hour from northern airports.

Do I need a passport? Legally, UK/Irish citizens don't under the Common Travel Area — but airlines require photo ID, and a passport is the one they all accept, so take it.

Which UK airport is cheapest? Whichever is nearest — Dublin is served from dozens of UK airports, so flying local is almost always cheapest.

When should I book? 3-6 weeks ahead most months; 6-10 weeks for St Patrick's weekend, summer, Christmas and big events.

Do you need a passport to fly to Dublin?

This is the most-asked question on the route, and the answer has two layers.

The legal position: Ireland and the UK share the Common Travel Area (CTA), a long-standing arrangement that lets British and Irish citizens travel, live and work between the two countries without needing a passport. So legally, a UK or Irish citizen does not require a passport to enter Ireland.

The practical reality: every airline still requires you to present an accepted form of photo ID to board an international flight, and each airline sets its own list. Most require a valid passport; some accept a passport card or other government photo ID on this specific route. Because the accepted-ID list varies by carrier and can change, the safest approach is simply to travel with your passport — it's the one document every airline accepts, every time. Turning up with only a driving licence risks being denied boarding if that carrier doesn't accept it.

Non-UK/Irish nationals travelling to Dublin must meet Ireland's normal entry requirements, which are separate from the CTA — check the UK government's Ireland travel advice and Irish immigration rules for your nationality before booking.

Airline-by-airline comparison (2026)

Ryanair — the price and frequency leader

Typical fare 2026: £17-£40 return off-peak, hand-luggage only; more at peak. UK airports: A huge network — London Stansted and Gatwick, Manchester, Liverpool, Birmingham, Edinburgh, Glasgow and many more. Pros: The most flights on the route (~396/week), the lowest headline fares, and departures from more UK airports than anyone. Frequent seat sales. Cons: Only a small under-seat bag is free; a larger cabin bag, hold bag, allocated seat and priority all cost extra. The cheap fare climbs fast if you need luggage.

Aer Lingus — Ireland's flag carrier

Typical fare 2026: £25-£60 return; cheapest fares cabin-only, higher tiers include a bag. UK airports: Heathrow, London City, Manchester, Edinburgh, Birmingham and more. Pros: Nearly as frequent as Ryanair (~388/week), a slightly more comfortable product, and its higher fare tiers bundle a checked bag and seat. Seamless connections at Dublin if you're travelling onward (Dublin has US pre-clearance, handy for transatlantic trips). Cons: Headline fare usually a little above Ryanair's; check the fare tier for what's included.

British Airways — Heathrow and London City

Typical fare 2026: £60-£120 return; "Basic" fares are cabin-only. Pros: London City is fast and central; Avios earning; standard fares include a bag. Cons: Only two London airports; pricier than the budget carriers.

easyJet

Typical fare 2026: £30-£70 return, hand-luggage only by default. Pros: Useful from several UK airports; frequent flights; regular sales. Cons: Hold bag and allocated seat cost extra, like Ryanair.

The honest read: for the lowest price travelling hand-luggage only, Ryanair wins. For a slightly nicer experience or a bundled bag and seat, Aer Lingus is often the better all-in value once luggage is added. BA suits London City convenience and Avios collectors.

UK airport comparison — fly local

Dublin is unusual in how widely it's served from the UK — Ryanair and Aer Lingus between them fly it from dozens of airports across England, Scotland, Wales and Northern Ireland. That means the cheapest and easiest option is almost always your nearest airport, not a trek to London.

The busiest and most competitive routes are from London (Stansted and Gatwick on Ryanair, Heathrow and City on Aer Lingus and BA), Manchester, Liverpool, Birmingham, Edinburgh and Glasgow, but plenty of smaller UK airports have direct Dublin flights too. Always price your local direct option first — on this route it rarely pays to route through a bigger airport.

Price bands by month for 2026

Round-trip economy, UK to Dublin, one adult. Representative ranges to plan against, not live quotes.

The pattern follows the usual UK-holiday shape — see our cheapest month to fly from the UK roundup — with Dublin's own big spike around St Patrick's weekend and event-driven jumps on rugby, concert and festival dates.

St Patrick's weekend and event dates

St Patrick's weekend (around 17 March) is Dublin's biggest party of the year and its single largest travel spike — flights and hotels both rise sharply for that specific weekend. If being there for the festival matters, book 8-12 weeks ahead. If you just want a cheap Dublin break, avoid that weekend and fares fall back to normal.

Beyond St Patrick's, watch for rugby Six Nations home weekends (usually February and March), major concerts and festivals at venues like the Aviva Stadium and 3Arena, and big GAA fixtures — any of these can lift fares and fill hotels on otherwise ordinary dates. Check the date before you book if your travel is flexible.

Baggage compared, honestly

The rule that saves the most: add any hold bag at booking, never at the airport, and compare the all-in price. A £20 Ryanair fare plus a £40 return hold bag is £60 — which can match or beat an Aer Lingus fare that already bundles a bag and seat. For a weekend, travel hand-luggage only and the budget fare stays tiny.

The booking windows that actually save money

• Off-peak months (Jan, Feb, late Sep, Oct, Nov): Book 3-6 weeks out — this short, high-frequency route doesn't reward booking far ahead outside peaks.
• St Patrick's weekend, summer, Christmas: Book 6-10 weeks out (8-12 for St Patrick's specifically).
• Event dates (rugby, concerts): Book as soon as the fixture or gig is announced.
• Weekend breaks: A midweek or Saturday-out departure often undercuts the Friday-evening rush.

Ryanair and Aer Lingus both run frequent sales, so set a price alert and book when a fare drops rather than paying the standing rate.

Dublin Airport to the city centre

Dublin Airport is about 10km north of the centre with no rail link, but transfers are quick and cheap. Frequent Airlink and Dublin Express coaches run into the city in around 25-40 minutes for a few euros, and regular city buses serve it too. A taxi takes 20-30 minutes and costs roughly €25-35. For most travellers the coach is the best value. Once you've sorted the flight and transfer, our best Dublin hotels 2026 guide covers where to base yourself, from Georgian townhouses to Temple Bar stays and budget rooms.

Common mistakes UK-Dublin travellers make

1. Travelling with only a driving licence. The CTA means no passport is legally required, but airlines require accepted photo ID — take your passport to be safe.
2. Booking St Patrick's weekend by accident. Check the date; that weekend is far pricier than the rest of March.
3. Routing through London unnecessarily. Dublin flies from dozens of UK airports — your local one is almost always cheapest.
4. Judging Ryanair on the headline fare. A £20 fare plus bags and seat can match an all-in Aer Lingus fare that bundles them.
5. Adding baggage at the airport. Always add it online at booking — Ryanair's airport bag fees are steep.
6. Overpacking for a city break. Dublin is a hand-luggage weekend; travel cabin-only and keep the fare low.
7. Forgetting non-UK/Irish nationals need to meet normal entry rules. The CTA covers British and Irish citizens only.

How to find the cheapest UK-Dublin fare

Run the search three ways on JetMeAway Flights:

1. Your local airport, specific dates — Dublin's dense UK network means flying local almost always wins; check yours first.
2. Date range ± 3 days — moving off a Friday-evening or St Patrick's date often drops the fare sharply.
3. Price alerts — set one and book when Ryanair or Aer Lingus drops a sale fare.

JetMeAway compares Ryanair, Aer Lingus, BA, easyJet and more from 20+ UK airports on live inventory, with zero markup — the price you see is the price the airline charges. Once your flight is booked, read our best Dublin hotels 2026 guide for where to stay, and our cheap flights from the UK guide for the wider booking tricks.

Sláinte, and safe travels.