How to Actually Find Cheap Flights in 2026 (a No-BS Guide from Belfast & Dublin)

Everyone has that one friend who books a £29 weekend in Lisbon and you have no idea how. They're not lucky. They just know which buttons to press.

Here's the actual workflow people who consistently find £30 European return flights from Belfast or Dublin use in 2026. No paid newsletters, no "travel hacker" mystique, just the stuff that works.

Start with the price graph, not the search bar

If you open Google Flights and type in fixed dates, you've already made it harder than it needs to be. The single most useful tool on the whole site is the Date grid and Price graph, both tucked under the date picker.

The Date grid shows you every depart/return combo for the next two months as a price matrix. The Price graph shows you the same data as a chart. Within about ten seconds you can see whether your route is cheaper on a Tuesday/Tuesday than a Friday/Sunday. (Spoiler: it almost always is, by 25 to 40 percent.)

This is also the move that breaks the "book on Tuesday at 3pm" myth. Days of the week you fly matter. Days of the week you book don't — that one's been debunked for years.

Be flexible on at least one variable

There are three things you can flex on, and the more you do, the cheaper the flight:

• Date — even a one-day shift can halve the price
• Airport — Belfast Intl (BFS), Belfast City (BHD) and Dublin (DUB) sometimes have wildly different fares to the same destination on the same day
• Destination — if you just want "somewhere sunny in late June", Google Flights' Explore map will rank the entire continent by price

If you can flex on two of those three, you'll consistently book under £80 return to mainland Europe in shoulder season. Flex on all three and you're in £30–£50 territory.

The actual filters that matter

Most people leave the default filters on and pay £40 extra in bag fees. Two filters do most of the work:

• Bags → 1 carry-on. Now the price you see is the price you pay. Ryanair and Wizz "£14.99" fares stop looking like £14.99 the second you add a cabin bag at checkout. Filter for it upfront and the headline figure is honest.
• Stops → Non-stop only (unless you're chasing a really exotic route). One layover usually adds three hours of your life for £20 saved. Not worth it from BFS/DUB where direct options are plentiful.

Build the tool stack, not one favourite

No single site wins every search. The combination that genuinely beats just-using-Skyscanner:

Tool	What it's actually for
Google Flights	Date flexibility, price graph, route discovery
Skyscanner	Cross-checking budget carriers Google sometimes hides
Kiwi	Weird multi-city routings that save 30%+ on long trips
Hopper	"Buy now vs wait" prediction on a specific route
Roambirds	Hand-picked deals from BFS, BHD and DUB so you don't have to hunt

On Roambirds we post the deals our team actually finds during our own searches, with the Google Flights link already loaded and a screenshot of the fare. It's the bit we built because we got sick of forwarding ourselves WhatsApp messages of bargain flights. Free, no signup, just open the home feed.

Mistake fares: still a thing, gone in under an hour

A mistake fare is exactly what it sounds like — an airline (or their booking system) accidentally publishes a fare that's 60 to 90 percent below normal. They typically last between 20 minutes and 4 hours before someone notices and pulls it.

If you spot one (you'll know — the price will look wrong), the rules are:

1. Book directly with the airline, not through Expedia or a third-party. Cleaner paper trail.
2. Don't ring the airline to check. You're just telling them they made a mistake.
3. Don't book non-refundable hotels for 48 to 72 hours. If the airline cancels, you get a full refund — but you don't want to be out €400 on a hotel.
4. Use a credit card, not a debit card. Better consumer protection if it all goes sideways.

Mistake fares are too rare to chase on your own. You either need to be deep in the deal-hunting Twitter scene or you need someone watching for you.

A few things that don't actually work

Honest list, because the internet is full of bad advice on this:

• Incognito mode isn't going to save you 20 percent. The "airlines raise prices based on your cookies" claim is mostly myth. It can't hurt, but don't expect a miracle.
• Booking exactly 6 weeks out isn't a magic number. Use the price graph instead — it tells you the actual cheapest window for your specific route.
• VPNs to a poorer country very rarely change the price on European budget airlines. It can work on long-haul fares occasionally, but it's a lot of faff for a small chance.

Caveats

Budget carriers will absolutely sting you on bag fees, seat selection and "priority boarding" if you let them. The headline £14.99 fare assumes you're bringing a small under-seat bag and you don't care where you sit. If you need a 10kg cabin bag, that's another £25–£35 each way on Ryanair and easyJet. Factor it in before you tell yourself you got a bargain.

And "cheap" doesn't mean "good value". A £30 flight at 5:55am from BFS that costs you a £40 taxi because there are no buses isn't really £30. Look at the total door-to-door cost when you're comparing options, especially for an overnight stay.

The pattern that emerges, if you do this consistently: the cheap fare is almost never on the day you originally wanted to fly. The trick isn't finding a cheaper version of your plan — it's letting the price graph tell you a slightly different plan that's half the price.