Frontier Airlines Bag Fees: Carry-On and Checked Bag Costs (2026)

# Frontier Airlines Bag Fees: Carry-On and Checked Bag Costs (2026)

Frontier Airlines charges $35–$79 for carry-on bags and $35–$99 for checked bags in 2026. The exact fee depends on when you add it — fees are lowest at booking and highest at the gate. For most travelers, adding bags at booking is the most affordable option.

Here's the complete Frontier bag fee schedule, every way to avoid the fees, and how Frontier compares to Spirit and Southwest.

Frontier Airlines Bag Fee Schedule (2026)#

Carry-On Bag Fees#

Carry-on size requirement: Maximum 24"×16"×10" (including handles/wheels), must fit in overhead bin. Frontier is strict about this.

Personal item: Free. Maximum size is 14"×18"×8". This must fit completely under the seat in front of you. A small backpack that fits under the seat is free — even if it's stuffed.

Checked Bag Fees#

Weight limit: 50 lbs for standard fee. Overweight fee: $75 for 51–100 lbs. Oversized (over 62" linear): $75.

Key insight: If you know you're checking a bag, add it at booking. Gate fees are 2–3x more expensive than booking fees.

The Frontier WORKS Bundle#

Frontier's "WORKS" bundle is a per-person add-on that includes:

WORKS cost: Typically $89–$180 round-trip per person depending on route and timing.

When WORKS is worth it: If you're checking a bag AND selecting a seat AND value flexibility, WORKS is often the better deal than adding each item separately. For a round-trip traveler with a checked bag and desired seat, WORKS can save $30–$50 vs. buying items à la carte.

Frontier Personal Item: What Qualifies as Free?#

Frontier's free personal item is 14"×18"×8" — a small backpack or a personal-size tote that fits under the seat.

Items that qualify (under the size limit):

• Small backpack (~20–25L)
• Laptop bag
• Purse or handbag
• Small duffel (if compressible)

Items that do NOT qualify:

• Standard backpack (most are too deep)
• 22" roller/carry-on suitcase (too large even for overhead)
• Camera bag that exceeds dimensions

Frontier's enforcement: Frontier gate agents check bag sizes with a sizer frame at the gate on many flights. If your personal item doesn't fit, you'll pay the carry-on fee at the gate (up to $79).

Practical tip: A 20L–25L backpack that compresses works well as a Frontier personal item. Brands like Osprey Daylite, Patagonia Atom, or similar slim-profile daypacks fit comfortably.

How to Avoid Frontier Bag Fees#

Option 1: Fly with only a personal item

Pack a small backpack that fits under the seat. This is the only way to pay the base Frontier fare without extra fees. You'd be surprised what fits in a 20L pack for a weekend trip.

Option 2: Use the Frontier credit card

The Frontier Airlines World Mastercard includes:

• Free carry-on bag for the cardholder
• Free first checked bag for the cardholder
• 50,000 bonus miles on approval
• Annual fee: $89/year

If you fly Frontier more than twice a year with checked bags, the card's bag fee savings (~$140+/year in round-trip bag fees) more than offset the annual fee.

Option 3: Buy WORKS at booking

If you need carry-on + checked bag + seat selection, WORKS is typically 10–20% cheaper than buying each à la carte.

Option 4: Book early

Bag fees are lowest when added at booking. The same carry-on that costs $35 at booking costs $79 at the gate. Set your reminder and add bags immediately when you book.

Frontier vs Spirit vs Southwest Bag Fees#

Southwest continues to include two free checked bags, a carry-on, and a personal item for all passengers — a major advantage for travelers who check bags. However, Southwest is changing its seating model (moving to assigned seating in 2025–2026); check current policies.

Key takeaway: Frontier and Spirit are nearly identical on bag fees. Both are dramatically worse than Southwest if you have bags. Southwest's lower flexibility (limited destinations) and no-same-day cheap last-minute tickets are the tradeoffs.

Frontier vs American/Delta/United Bag Fees#

For travelers with just a carry-on: Frontier can be significantly cheaper on base fare. For travelers with a checked bag: the fees narrow the gap considerably.

When Frontier beats the majors: If the Frontier base fare is $75 less than Delta for the same route, and you only have a personal item, Frontier wins. If you add a checked bag ($40 each way on Frontier vs included on Delta's higher fare), you may break even or pay more on Frontier.

FAQ#

What size bag is free on Frontier?

Frontier allows one free personal item per passenger, maximum 14"×18"×8". The item must fit completely under the seat in front of you. Anything larger requires a carry-on fee.

Can I bring a backpack on Frontier for free?

Yes — if it fits the personal item dimensions (14"×18"×8") and fits under the seat. Most standard backpacks are too large and require the carry-on fee.

Why are Frontier bag fees so high at the gate?

Frontier charges the highest fees at the gate to incentivize passengers to buy bags in advance (at lower prices online). The strategy generates revenue from travelers who forget or decide to add bags last-minute.

Does Frontier weigh carry-on bags?

Frontier measures but generally does not weigh carry-on bags. The concern is dimensions — that it fits in the overhead bin. Checked bags are weighed at the counter (50 lb limit).

Is Frontier reliable?

Frontier has a higher cancellation rate (~3.4%) and lower on-time rate (~70%) compared to Delta (~0.5% cancel, ~88% on-time). For time-sensitive travel, this matters. For flexible leisure travel, the cost savings may be worth it.

Does Frontier have free bags with any credit cards?

The Frontier Airlines World Mastercard includes a free carry-on and first checked bag for the cardholder. No annual fee waiver on the bag benefit — you'll pay the $89/year card fee but save on bag fees.

Bottom Line#

Frontier bag fees are $35–$79 for carry-ons and $35–$99 for checked bags. The single most important rule: buy bags at booking for the lowest price. Gate fees are up to twice as expensive. If you're checking a bag and want seat selection, the WORKS bundle typically saves money vs. à la carte. For carry-on-free travelers with a small personal item, Frontier can represent genuine savings over major carriers.

For a full comparison of Frontier vs Spirit — fees, routes, reliability, and which is actually cheaper — see our comparison.

Related Comparisons#

• Spirit Airlines vs Frontier: Full Comparison
• Southwest vs Frontier Airlines: Which Is Better?
• Ultra Low Cost Airlines: Spirit, Frontier, Allegiant Compared