JetBlue personal item

JetBlue’s personal item is 17 × 13 × 8 in (43.2 × 33 × 20.32 cm) and must fit under the seat. It is free with 1 carry-on on every fare including Main Base (formerly Blue Basic). Official examples: purse, small backpack, briefcase, laptop; a pet carrier counts as the personal item. Don’t confuse it with the free carry-on limit of 22 × 14 × 9 in.

Field	JetBlue published value
Max dimensions (in)	17 × 13 × 8 in (official published L×W×H)
Max dimensions (cm)	43.2 × 33 × 20.32 cm (official)
Placement	Under the seat (not overhead)
Cost	Free — all fares (incl. Main Base) · plus free carry-on
Weight	None published for personal item — do not invent
If oversized	May not qualify as personal item; could count as your carry-on or need to check — no invented JetBlue gate $
Carry-on contrast	22 × 14 × 9 in / 55.88 × 35.56 × 22.86 cm; free all fares; no weight limit if lift → carry-on size · Calculator width typo 15.56 → use 35.56 (confirm until JetBlue fixes the calculator)
Allowed examples	Purse, small backpack, briefcase, laptop; pet carrier = personal item
Main Base interaction	Main Base = personal item + carry-on both free (critical contrast vs United BE; Blue Basic = legacy name)
Sizer / enforcement	Under-seat fit; overhead space permitting for carry-ons — gate-check possible if bins full
Contrast: United / Frontier / American	United 9 × 10 × 17 in; Frontier & American often 18 × 14 × 8 in

Personal item: always free if it meets 17 × 13 × 8 in (43.2 × 33 × 20.32 cm) and fits under the seat.

Full carry-on: also free on all fares including Main Base (22 × 14 × 9 in). (One-line rename: legacy Blue Basic → today’s Main Base for current bookings.)

Checked bags: paid unless a Mosaic / card / military / Mint waiver applies. Researched prepaid off-peak figures are $45 / $59 (1st / 2nd) when added more than 24 hours before departure, with higher ≤24h and peak amounts — full dual-channel table on JetBlue baggage fees. Don’t duplicate full fee tables here.

Unlike United Basic Economy on most domestic routes, JetBlue Main Base keeps both the free personal item and the free overhead carry-on.

• Published dims exist — blogs inventing other JetBlue personal-item inches are wrong; use 17 × 13 × 8.
• Soft bags that don’t fit under the seat may be refused as a personal item.
• Pet carrier counts as the personal item (not a free extra).
• Do not cite United’s $75 gate fee for a failed personal item as a JetBlue rule — JetBlue does not publish that fee.
• Carry-on dims (22 × 14 × 9) are not the personal-item limit.
• Bag Calculator carry-on cm typo (15.56 vs 35.56) does not change personal-item 43.2 × 33 × 20.32 — still confirm calculator accuracy generally.
• Previous Blue Basic page returned 404 at research time; treat rename history as unofficial unless JetBlue republishes it.

1. Choose a bag ≤17 × 13 × 8 in when packed; measure packed, not empty marketing size.
2. Use the free carry-on (still free on Main Base) when you need more space.
3. For checked fees, stay on the baggage fees sibling — no Amazon fee framing.
4. Prepay checked bags >24h out if you must check — see the fees page.

Soft picks for under-seat / JetBlue personal-item size. Prefer non-expanding backpacks and totes marketed at or under 17 × 13 × 8 in. Measure when packed.

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AmazonCard — Under-seat backpack (≤17×13×8)
Daypack or personal-item backpack marketed for airline under-seat use. Confirm listed exterior dimensions stay within JetBlue’s 17 × 13 × 8 in (43.2 × 33 × 20.32 cm) when packed — and remember you still get a free overhead carry-on on Main Base.

AmazonCard — Slim personal-item tote / laptop bag
Structured tote or slim laptop shoulder bag aimed at under-seat fit. Useful when you want a purse-style personal item that still clears JetBlue’s published 17 × 13 × 8 without expanding past the under-seat zone.

When a dedicated BagRule guide goes live, start at /guides/best-personal-item-bag/ — until then, filter for ≤17×13×8 in and verify yourself.

What is the JetBlue personal item size?

17 × 13 × 8 inches (43.2 × 33 × 20.32 cm). Must fit under the seat. Examples: purse, small backpack, briefcase, laptop; a pet carrier counts as the personal item.

Is a personal item free on JetBlue Main Base (Blue Basic)?

Yes — Main Base includes one free personal item and one free carry-on (unlike United Basic Economy on most routes). Use Main Base as the current fare name.

What if my personal item doesn’t fit under the JetBlue seat?

It may not count as a personal item and could need to go in the overhead (as your carry-on) or be checked. Do not invent a United-style $75 personal-item gate fee for JetBlue.

Does JetBlue allow a backpack as a personal item?

Yes if it is a small backpack that fits ≤17 × 13 × 8 and under the seat when packed.

What’s the difference between JetBlue personal item and carry-on?

Personal: 17 × 13 × 8 in, under seat, free. Carry-on: 22 × 14 × 9 in (55.88 × 35.56 × 22.86 cm), overhead, also free on all fares including Main Base. Full carry-on detail: JetBlue carry-on size.

How does JetBlue’s personal item compare to United, Frontier, or Delta?

JetBlue publishes 17 × 13 × 8; United 9 × 10 × 17; Frontier / American often 18 × 14 × 8. Delta / Alaska: under seat only, no published L×W×H. See sibling pages for those airlines.

Confirm sizes and fees on jetblue.com before travel. BagRule is not affiliated with JetBlue Airways.