Frontier and Ryanair do not include a free carry-on bag in their base fares. Each airline allows one free personal item that fits under the seat. Anything going in the overhead bin costs extra — and gate fees are always the most expensive option. Buy baggage at booking to save the most money.
You booked a $39 flight. You’re pumped. Then you show up at the gate with your rolling suitcase and suddenly you’re handing over $79 you didn’t plan to spend.
That’s the budget airline trap — and millions of travelers fall into it every year.
The good news? It’s completely avoidable once you know the rules. This guide breaks down budget airline carry-on rules for 2026 for Frontier and Ryanair — with real size limits, fee ranges, enforcement reality, and simple tips to keep more money in your pocket. Every figure below was verified directly from official airline sources in 2026.
Note: Spirit Airlines ceased all operations on May 2, 2026 and is no longer bookable. If you were looking for Spirit-specific information, see our updated US Domestic Airlines Carry-On Rules guide — Frontier below now covers most of the same routes and price range.
Quick Comparison (2026)
| Airline | Free Bag | Carry-On Size | Carry-On Cost | Strictness |
|---|---|---|---|---|
| Frontier | 14×18×8 in | 24×16×10 in | ~$60 → $99+ | ⚠️ Moderate |
| Ryanair | 40×30×20 cm | 55×40×20 cm | €9 → €45 | 🔥 Very strict |
What Makes Budget Airline Carry-On Rules Different in 2026?
Quick Answer: Unlike legacy carriers, budget airlines like Frontier and Ryanair charge separately for carry-on bags. Your base ticket only includes one small personal item. Everything else — overhead bin bags, checked bags — costs extra and gets more expensive the longer you wait to buy.
Most people are used to airlines like Delta or American, where a carry-on bag in the overhead bin is just… included. You pack your standard roller bag, shove it overhead, done.
Budget airlines flipped that model. They strip the ticket down to just your seat and a tiny personal item, then charge you for every other item individually. It’s called “unbundling,” and it’s how they can offer those jaw-dropping base fares.
The trick is that the fees add up fast — especially if you buy at the wrong time or show up at the gate without having paid. That’s where travelers get burned.
Three things to always remember across both airlines:
- One free personal item is included (under-seat only)
- Carry-on bags for the overhead bin cost extra
- Gate fees are always the most expensive option — often double the booking price
Frontier Baggage Policy: Carry-On 2026
Quick Answer: Frontier Airlines does not include a carry-on bag in its base fare. One free personal item (max 14 x 18 x 8 inches) is included per ticket.
A carry-on bag (max 24 x 16 x 10 inches, 35 lbs) costs $60–$99+ depending on your route and when you purchase. Uniquely, Frontier sometimes charges more for a carry-on than a checked bag.
Travel Essentials for Your Next Spirit Airlines
What Frontier Includes for Free
Frontier gives you one free personal item — a bag small enough to slide under the seat. Think tote bag, laptop bag, small backpack, or briefcase. Carry-on bags (for the overhead bin) are a paid add-on unless you’ve booked a bundle fare.
Frontier Carry-On Size Rules
| Bag Type | Max Size | Where It Goes | Cost |
|---|---|---|---|
| Personal item | 14 x 18 x 8 in (H x W x D) | Under the seat | Free |
| Carry-on bag | 24 x 16 x 10 in (H x W x D), max 35 lbs | Overhead bin | Paid |
All dimensions include handles, wheels, and straps. If you’re trying to avoid carry-on fees, choosing the right personal item size is key — see our the Best 18x14x8 Personal Item Bags for 2026 for options that fit Frontier’s limit.
Frontier Carry-On Fees in 2026
Frontier’s carry-on fees vary by route but typically fall in the $60–$99 range. Like most budget carriers, you pay more the closer you get to your flight — cheapest at booking, most expensive at the gate.
Here’s the quirk that surprises a lot of travelers: on some Frontier routes, a checked bag costs less than a carry-on. That’s unusual — almost no other US airline works that way. If you’re not rushing for a connection, it might actually save you money to check your bag instead of carrying it on.
How Strict Is Frontier About Carry-On Rules?
Moderately strict. Frontier officially states that personal item sizes are checked at the boarding gate, and oversized items get charged.
That said, enforcement varies more than some other budget carriers — some airports and gates are more consistent than others. Still, don’t count on getting through. Measure your bag every time, no exceptions.
Frontier Bundle Options That Include Carry-Ons
If you need both a carry-on and a checked bag, Frontier’s bundles often make more financial sense than buying each item separately:
- The Works Bundle: Carry-on + checked bag + seat selection + priority boarding + flight flexibility. Fully refundable.
- The Perks Bundle: Carry-on + checked bag + seat selection.
Check the bundle pricing against à la carte bag fees before you book. For many routes, the bundle wins.
Who Gets a Free Carry-On on Frontier?
- Frontier Miles Elite Gold: 1 free carry-on bag
- Frontier Miles Elite Platinum: Free carry-on + first checked bag
- Active U.S. Military (with Common Access Card): Free carry-on + 2 checked bags
Ryanair Carry-On Size Rules 2026
Quick Answer: Ryanair includes one free small personal bag (40 x 30 x 20 cm) per passenger. To bring a larger bag in the overhead bin, you must purchase “Priority & 2 Cabin Bags,” which allows a second 10 kg bag (55 x 40 x 20 cm). Without Priority, your bag must go under the seat. Ryanair is one of Europe’s strictest airlines for bag enforcement.
What Changed for Ryanair in 2025–2026
Ryanair updated its free personal bag size in July 2025. The free under-seat allowance increased from 40 x 25 x 20 cm to 40 x 30 x 20 cm — an extra 5 cm of width.
In practice, that means you can now fit a compact soft-sided daypack, a light layer, your charger, toiletries, and a book without fighting the zipper.
Ryanair Carry-On Bag Size Rules
| Bag Type | Max Size | Where It Goes | Cost |
|---|---|---|---|
| Personal bag (free) | 40 x 30 x 20 cm | Under the seat | Free (all fares) |
| 10 kg cabin bag (Priority) | 55 x 40 x 20 cm | Overhead bin | Paid (Priority add-on) |
The free personal bag has no official weight limit, but must fit comfortably under the seat without bulging. The Priority cabin bag must weigh no more than 10 kg (22 lbs).
Travel Essentials for Your Next Ryanair Flight
Understanding Ryanair’s Priority Boarding Rule
This is the rule that catches the most people off guard.
Without Priority: You may bring only your free underseat bag. No overhead bin access.
With “Priority & 2 Cabin Bags”: You can bring both your free bag and the 10 kg overhead bag, plus you board first.
Priority typically costs €9.49 to €44.99 depending on the route and how far in advance you buy. If you arrive at the gate without Priority and try to use the overhead bin, Ryanair will gate-check your bag — at a fee that’s significantly higher than Priority would have cost.
How Strict Is Ryanair About Carry-On Bags?
Extremely strict. Ryanair consistently scores among the highest in Europe for cabin bag enforcement. Gate staff use rigid metal sizer frames — if your bag doesn’t physically fit in the cage, you pay. There’s no negotiating.
The most common failure points:
- Hard-sided bags where wheels add height beyond the limit
- Bags overpacked so the shape won’t compress
- Pockets stuffed to the point the bag no longer fits the sizer dimensions
Real-world tip: Soft-sided bags are almost always safer on Ryanair than hard-sided ones. A soft bag that’s packed reasonably will compress a bit; a hard shell won’t.
For the full breakdown of Ryanair’s checked bag fees, sports equipment charges, and infant equipment allowances, see our dedicated Ultimate 2026 Ryanair Cabin Bag Guide.
2026 Comparison: Frontier vs. Ryanair Carry-On Rules
| Feature | Frontier | Ryanair |
|---|---|---|
| Free personal item size | 14 x 18 x 8 in | 40 x 30 x 20 cm |
| Personal item location | Under the seat | Under the seat |
| Carry-on (overhead) size | 24 x 16 x 10 in | 55 x 40 x 20 cm |
| Carry-on weight limit | 35 lbs | 10 kg (22 lbs) |
| Carry-on fee at booking | ~$60+ | €9.49–€44.99 (Priority) |
| Gate fee risk | High | Very high |
| Strictness level | ⭐⭐⭐ Moderate | ⭐⭐⭐⭐⭐ Very strict |
| Best bundle option | The Works Bundle | Priority & 2 Cabin Bags |
| Cheapest time to buy | At booking | At booking |
How to Avoid Carry-On Fees on Budget Airlines: 6 Real Tips
- Fly with just your personal item. For trips of 2–4 days, a well-packed personal item is genuinely enough. Use a soft-sided backpack, roll your clothes, and leave the bulky shoes at home. You’ll move through airports faster too.
- Always buy bags at booking — the price only goes up. On both airlines, the cheapest time to add a carry-on is when you first book your ticket. Every step after that — check-in, airport, gate — costs more. On Frontier you can add bags up to 24 hours before departure and still get a decent rate.
- Measure your bag externally, not by the label. Luggage companies list internal capacity, not external dimensions with wheels and handles. Use a tape measure on your actual packed bag — height including wheels, width at the widest point, and depth including any pockets or feet.
- On Frontier, compare carry-on vs. checked bag prices. A checked bag sometimes costs less than a carry-on. If you’re not on a tight connection schedule, check the math — it could save you $20–$30 each way.
- Use soft-sided bags on Ryanair. Rigid-sided rollers with protruding wheels fail Ryanair’s sizer more than any other bag type. A soft daypack or duffel that can be gently compressed fits more reliably.
- On Ryanair, buy Priority if you need overhead space. Full stop. Don’t gamble on this one. If you have a bag that won’t go under the seat, buy Priority at booking — the gate fee for oversized bags without Priority is always more than Priority would have cost.
FAQ: Frontier & Ryanair Carry-On Rules 2026
Does Frontier include a free carry-on bag?
No. Frontier only includes one free personal item (14 x 18 x 8 inches) with every fare. A carry-on bag for the overhead bin costs extra, typically $60–$99 depending on when you buy.
What is Frontier’s personal item size limit?
14 x 18 x 8 inches (35.6 x 45.7 x 20.3 cm), including handles, wheels, and straps. It must fit fully under the seat in front of you.
Can a carry-on cost more than a checked bag on Frontier?
Yes, on some routes — this is unusual among US airlines. Always compare both prices before assuming the carry-on is the cheaper option.
Does Ryanair allow a free carry-on bag?
Ryanair includes one free personal item (40 x 30 x 20 cm) that must fit under the seat. A larger bag for the overhead bin requires purchasing “Priority & 2 Cabin Bags.”
How strict is Ryanair about bag size?
Ryanair uses rigid metal sizer frames at the gate — if your bag doesn’t physically fit, you pay, regardless of how close it is to the limit.
What happens if my Ryanair bag doesn’t fit and I don’t have Priority?
It will be gate-checked at a fee significantly higher than what Priority would have cost if purchased in advance.
Final Thoughts: The #1 Rule for Flying Budget Airlines in 2026
Here’s the thing about Frontier and Ryanair: they’re not trying to trick you. Their fee structures are published clearly — they just count on most travelers not reading them until it’s too late.
Once you know the rules, the math is actually pretty simple. Buy your bags at booking. Measure everything. Use your free personal item well.
Do those three things and you’ll almost never get hit with a surprise fee at the gate. And when you’re paying $39 for a flight that would cost $180 on a legacy carrier, a little preparation is absolutely worth it.
Related Reading
- Best Personal Item Bags for Budget Airlines in 2026 — bags that fit Frontier and Ryanair’s free allowance
- What Size Suitcase for a 7-Day Trip? 22 vs 24 Inch Luggage Size Guide
- Luggage Buying Guide: How To Choose the Right Suitcase for Your Next Trip
Baggage policies are subject to change. Always verify current rules on FlyFrontier.com and Ryanair.com before you travel.
