Best Underseat Cabin Bags UK 2026 — Ryanair, EasyJet and Jet2 Approved
Buying a cabin bag in 2026 isn't as simple as picking a size you like. Every airline has different rules, different sizers and different gate fees if you get it wrong.
This guide covers everything you need to know to pick the best underseat cabin bag for your airline — and why getting the right one pays for itself on the very first trip.
What Makes a Good Underseat Cabin Bag?
There are five things that actually matter when choosing an underseat cabin bag:
1. Exact dimensions Not approximately right — exactly right. Airline gate sizers have zero tolerance. A bag that's 1cm over gets pulled and charged. Always buy a bag that's built to the precise maximum dimensions for your airline.
2. Lightweight construction Every gram in the bag is a gram less you can pack. A heavy case eats into your packing capacity before you've put a single item in. Look for hard shell ABS construction — strong, light and keeps its shape.
3. Smart features The best cabin bags in 2026 go beyond just a shell and some wheels. Built-in phone holders, cup holders and silent spinner wheels make the airport experience significantly smoother.
4. Durability A cabin bag that falls apart after three trips is a false economy. Look for hard shell cases with reinforced corners and quality spinner wheels that won't crack or seize up.
5. Price vs value The cheapest bag isn't always the best value. One avoided gate fee pays for a quality case — after that every trip is pure saving.
What Size Do You Need? — 2026 Airline Guide
Getting the size wrong is the most common and most expensive mistake travellers make. Here's the current free underseat allowance for every major UK budget airline:
| Airline | Free Underseat Size | Gate Fee if Wrong |
|---|---|---|
| Ryanair | 40x30x20cm | Up to £70 |
| Wizz Air | 40x30x20cm | Up to £65 |
| EasyJet | 45x36x20cm | Varies by route |
| Jet2 | 56x45x25cm | Varies by route |
Important: These are the dimensions including wheels and handles. Always measure your bag fully extended.
Best Underseat Cabin Bag for Ryanair 2026
If you fly Ryanair the bag you need is 40x30x20cm — exactly. Not 41cm, not roughly 40cm. Ryanair's metal gate sizers are used strictly and there's no grace.
🧳 WOW Travel Ryanair Approved 40x30x20cm Underseat Cabin Suitcase
This is our most popular case and it's built specifically for Ryanair's free underseat allowance. Here's what sets it apart:
- ✅ Exact 40x30x20cm dimensions — passes the Ryanair sizer every time
- ✅ Detachable wheels — remove in seconds for maximum packing space and guaranteed sizer fit
- ✅ Built-in phone holder — hands-free at the gate
- ✅ Built-in cup holder — perfect for early morning boarding
- ✅ Silent 360 degree spinner wheels
- ✅ Lightweight hard shell ABS construction
- ✅ Available in 9 colours from £24.95
Also approved for Wizz Air flights using the same 40x30x20cm allowance.
Best Underseat Cabin Bag for EasyJet and Jet2 2026
EasyJet and Jet2 give you a larger free allowance — 45x36x20cm — which comfortably fits a 3 to 4 day trip without needing to pay for anything extra.
🧳 WOW Travel EasyJet & Jet2 Approved 45x36x20cm Underseat Cabin Suitcase
Built to the exact EasyJet and Jet2 free underseat dimensions with the same premium features:
- ✅ Exact 45x36x20cm dimensions — maximum free size for EasyJet and Jet2
- ✅ Built-in phone holder and cup holder
- ✅ Silent 360 degree spinner wheels
- ✅ Lightweight hard shell ABS construction
- ✅ Available in 9 colours from £24.95
Which Size Should You Buy?
This depends entirely on which airline you fly most:
Buy the 40x30x20cm if you:
- Fly Ryanair or Wizz Air regularly
- Want one bag that works across all budget airlines
- Travel light for 1 to 3 days
Buy the 45x36x20cm if you:
- Fly EasyJet or Jet2 regularly
- Travel for 3 to 5 days and need more space
- Want to maximise your free allowance on EasyJet
Can I use the EasyJet bag on Ryanair? No — the 45x36x20cm EasyJet bag is too large for Ryanair's 40x30x20cm free allowance. You'd face a gate fee. If you fly both airlines regularly, the 40x30x20cm Ryanair case fits within EasyJet's allowance too — making it the more versatile choice.
5 Things to Check Before You Buy Any Cabin Bag
1. Measure the bag including wheels and handles The airline measures the whole bag — not just the shell. Many bags advertised as 40x30x20cm are actually larger once wheels and handles are included.
2. Check if it's been tested against the actual gate sizer Any brand can claim their bag fits. Look for bags specifically engineered to the airline's maximum dimensions rather than just approximately sized.
3. Check the weight A lightweight case leaves more room for your belongings. Aim for under 1.5kg for a small cabin case.
4. Look at the wheel quality Cheap wheels crack, seize and rattle. Silent 360 degree spinner wheels make a significant difference over a long terminal walk.
5. Think about features you'll actually use A phone holder and cup holder sound like gimmicks until you're standing in a 30 minute boarding queue with a coffee, your phone and your boarding pass. Then they're essential.
The WOW Travel Range — Built for Budget Airlines
Every WOW Travel cabin case is designed specifically around airline size requirements — not the other way around. We start with the airline's exact dimensions and build the best possible case within them.
Available in a full range of colours for both Ryanair and EasyJet sizes — so you can travel in style without ever paying a gate fee again.