Why Carry-On Only Is Worth the Effort
The case for carry-on only travel has never been stronger. In 2026, checked bag fees average $35–$60 each way on US carriers, €15–€65 on European budget carriers, and can exceed $100 on some international routes. Round-trip, that is $70–$200 per trip — per bag — money that compounds over a year of travel.
Beyond cost: no waiting at baggage claim (typically 20–45 minutes), no risk of lost luggage, and the freedom to dash to a connection. Once you travel carry-on only, it is difficult to go back.
The Size Rules: Every Major Airline (2026)
The critical difference between airlines is whether they count your personal item and carry-on separately, or just one bag. Many budget carriers have tightened rules recently.
| Airline | Carry-On Max Dimensions | Weight Limit | Personal Item Allowed? |
|---|---|---|---|
| Delta (US) | 22 × 14 × 9 in (56 × 36 × 23 cm) | None specified | Yes — under seat |
| United (US) | 22 × 14 × 9 in | None specified | Yes — under seat |
| American (US) | 22 × 14 × 9 in | None specified | Yes — under seat |
| British Airways | 56 × 45 × 25 cm | None specified | Yes — small |
| Lufthansa | 55 × 40 × 23 cm | None specified | Yes (40 × 30 × 10 cm) |
| Ryanair | 40 × 20 × 25 cm (free) / 55 × 40 × 20 cm (paid) | 10 kg | 1 bag total (priority) |
| EasyJet | 56 × 45 × 25 cm | 15 kg | Small handbag only |
| Air Asia | 56 × 36 × 23 cm | 7 kg | Small bag |
| Singapore Airlines | 54 × 38 × 23 cm | 7 kg total | Yes |
| Emirates | 55 × 38 × 20 cm | 7 kg | Yes (laptop bag) |
Budget airline alert: Ryanair and Wizz Air now require paid "Priority" for overhead bin access. The free cabin bag must go under the seat. This effectively shrinks your free allowance to personal-item size.
The Carry-On Only Packing System
Step 1: Choose the Right Bag
For carry-on only travel, a 40-liter bag hits the sweet spot:
- Fits in every airline's overhead bin
- Large enough for 7–10 days of travel
- Small enough to avoid gate-checking on crowded flights
Top choices: Osprey Farpoint 40, Away Carry-On, Tropicfeel Shell 22L (for minimalists).
Step 2: The Clothing System (10 Days, 10 Items)
The "10-item" system:
- 3 × t-shirts / tops (choose wrinkle-resistant fabrics: merino wool, polyester blend)
- 2 × bottoms (one casual, one versatile enough for a restaurant)
- 1 × light jacket or cardigan
- 1 × dress outfit / blazer for work travelers
- 3 × underwear + socks (wash every 3 days, or pack 5 if squeamish)
Merino wool is the carry-on traveler's best friend — odor-resistant, wrinkle-resistant, packs small, usable for 2–3 days between washes.
Step 3: The Liquids Rule (Still Applies in 2026)
Most countries still enforce the 100ml-per-container rule. Use:
- Travel-size containers (Muji or Nalgene travel bottles)
- Solid toiletries: shampoo bars, conditioner bars, solid deodorant
- Rely on hotel-provided toiletries for stays over 3 nights
Step 4: Electronics
- Laptop goes in the personal item / laptop sleeve
- Phone + cables + adapters in a tech organizer pouch
- If bringing a camera: mirrorless over DSLR for size savings
Step 5: The Cube System
Use packing cubes to compress clothing and organize by category. A 40L bag with 3 packing cubes (small/medium/large) turns chaotic packing into a Tetris game you always win.
When to Actually Check a Bag
Carry-on only is not always the answer:
- Trips longer than 14 days (laundry access matters)
- Winter trips requiring heavy coats and boots
- Trips where you need specialized gear (ski equipment, diving gear, camera equipment)
- When checked baggage is free or already included (review before booking)
Use the baggage allowance calculator to compare your airline's exact rules and fees before deciding.