What is the cheapest way to fly in Europe with a carry-on bag?

Book a budget airline (Ryanair, easyJet, Wizz Air) with a personal item only — no cabin bag add-on. A small bag that fits under the seat is always free. This tier often costs 20–40 GBP one-way, which is 15–25 GBP less than adding a cabin bag.

Does Google Flights show whether carry-on is included?

Yes. In Google Flights, click the filter icon and look for the Bags section where you can filter by carry-on included. This removes fares that charge extra for a standard cabin bag.

Is hidden city ticketing safe when travelling carry-on only?

Hidden city ticketing (buying a ticket to a connecting city and deplaning at the layover) only works reliably with carry-on bags — no checked luggage. It is against most airline terms of service and can result in account bans or voided return legs. Use it with awareness of the risks.

How does carry-on only help with last-minute flight changes?

Without checked bags you can change to an earlier flight at the airport, use standby, or switch airlines entirely. You are not tied to a specific flight for bag retrieval, which gives you flexibility that checked-bag travelers do not have.

Which flight search tools show total cost including bag fees?

Google Flights shows bag fees inline on many routes. Kayak has a filter for bags included. Scott's Cheap Flights and Going.com focus on deal fares but show base price — add bag fees manually. Kiwi.com is useful for mixing carriers on multi-city trips.

How to Get Cheap Flights When Travelling Carry-On Only

Travelling carry-on only is not just a packing philosophy — it is a pricing strategy. The cheapest fares on budget airlines are priced without any bags, and if you can fit everything into what the airline defines as a personal item, you can access those base fares without paying a penny more.

Tier 1: Personal Item Only (Cheapest)

Every major airline, including ultra-low-cost carriers, allows at least one small personal item in the cabin for free. On European budget airlines, the distinction is typically:

Personal item (free): fits under the seat in front — roughly 40×20×25 cm, under 10 kg
Cabin bag (paid add-on): fits in the overhead bin — roughly 55×40×20 cm, costs £12–£30 per flight

On Ryanair, the cheapest "Priority" add-on needed to bring a full-size cabin bag costs around £6–£28 depending on the route and when you book. On Wizz Air, the cabin bag fee ranges from £8 to £30. On easyJet, non-Plus cardholders pay £7–£28.

If you can pack everything into a bag that goes under the seat, you avoid these fees entirely. For a return trip, that is potentially £30–£60 saved — enough to cover another flight.

What fits under the seat on most aircraft: a 20–25 litre backpack or a small cabin bag on its side. Brands like Osprey Daylite Plus (20L), Cabin Zero Classic 28L (borderline), and Tropicfeel Shell (24L) are popular choices that pass the personal item test on most carriers.

Using Google Flights to Filter for Carry-On Included

Google Flights has a built-in bag filter that many travelers never use.

How to find it:

Run a standard search for your route and dates
Click "All filters" or the filter bar at the top of results
Look for the "Bags" section — select "Carry-on bag" to show only fares where a cabin bag is included in the base price

This filter is useful for comparing full-service airlines (where carry-on is always included) against low-cost carriers. It reveals the true cheapest fare for an apples-to-apples comparison.

Note: the filter is not always available for all routes and the bag fee data is not always current. Verify on the airline's website before booking.

Calculating the True Total Cost

The advertised price of a budget airline ticket is almost never the price you pay. A disciplined comparison looks like this:

Component	Budget airline	Full-service airline
Base fare	£29	£89
Cabin bag fee	£18	£0
Seat selection	£8	£0
Total	£55	£89

In this example the budget airline is still cheaper, but the gap is £34, not £60. On some routes, once you add a cabin bag and a seat, the budget airline costs more than the full-service option.

Always add bag fees before comparing. Skyscanner, Google Flights, and Kayak all show base fares by default.

Mixing Carriers for Multi-City Trips

One of the best uses of carry-on travel is mixing airlines within a single trip. Without checked bags, you are not reliant on interline bag agreements or same-airline connections.

A common example: a cheap transatlantic flight (Norwegian, Level, Condor, or a full-service airline on a sale) into a major European hub, then a budget European carrier (Ryanair, Wizz Air) for the regional leg. The savings on the regional segment can be substantial — a Ryanair London-to-Lisbon fare can be a fraction of a connecting itinerary on a single carrier.

What to watch for when mixing carriers:

Each airline enforces its own carry-on size rules — a bag that passes Ryanair's sizer may be over the limit for Wizz Air
You will need to re-check in for the second carrier and potentially go through security again
Any delay on the first flight is your problem — you have no protection between separate bookings

Tools like Kiwi.com specialize in mixing carriers and include missed-connection protection for separately booked flights.

How Carry-On Only Enables Flight Flexibility

Being carry-on only gives you options that checked-bag travelers simply do not have:

Same-day flight changes: airlines frequently allow free same-day standby on an earlier flight for elite members or a small fee for other passengers. Without checked bags, you can grab an earlier flight if your plans change.

Last-minute bookings: carry-on only travelers can book a flight hours before departure. No need to factor in checked bag logistics or arrive early for bag drop.

Missed connection recovery: if you miss a connection and need to rebook on a different airline, a carry-on traveler can do it. A checked-bag traveler has to wait for bags to be reunited, which may take hours or a day.

One-way ticket strategy: carry-on travel pairs well with flexible one-way tickets. You pay for one flight at a time and change plans without penalty from bag logistics.

Hidden City Ticketing: Understand the Risk

Hidden city ticketing means buying a ticket to a destination beyond where you actually want to go and deplaning at the layover city. For example, buying a London-Paris-Barcelona ticket when you actually want to go to Paris — the Paris-Barcelona leg is wasted.

Hidden city fares sometimes cost less than direct routes because airlines price routes based on demand, and a connecting itinerary to a third city can be priced lower than the direct ticket to the layover.

This only works with carry-on bags. Your checked luggage goes to the final destination on the ticket — if you deplane at the layover, your bags continue to Barcelona without you.

The risks are real:

Against most airlines' terms of service — accounts can be banned
If the first flight is delayed and you miss the layover, the airline rebooks you to the final destination, not where you wanted to stop
Return legs on the same booking are voided once you no longer show up for a segment

Sites like Skiplagged and Secret Flying surface hidden city fares. Use them with clear eyes about the terms.

Flight Deal Sites That Help Carry-On Travelers

Going.com (Scott's Cheap Flights): focuses on mistake fares and sale prices. Primarily transatlantic and international. Bag fees not shown — check separately.
Secret Flying: aggregates airline error fares and sales worldwide
Airfarewatchdog: alerts for specific routes
Kiwi.com: the best tool for mixing carriers on complex itineraries, with a carry-on bag filter built into the search
Hopper: predicts whether prices will rise or fall, useful for timing bookings on routes you are watching

The common thread: none of these sites solve the bag fee problem automatically. You still need to calculate total cost after adding your carry-on add-on (or confirm the fare tier includes one).