American Airlines vs Delta Airlines Carry-On Size

You book a round trip without thinking much about baggage rules. Outbound is with American Airlines, return is with Delta. Same suitcase, same packing—should be fine, right? Then at the gate, one airline accepts your bag easily, while the other gives you a second look.

This kind of situation happens more often than you’d expect. Even when two airlines seem similar, small differences in carry-on size, personal item rules, and enforcement can change your experience at the airport.

Let’s compare American Airlines vs Delta Airlines carry-on size in a clear, practical way so you know what actually works.

Table of Contents

Feature	American Airlines	Delta Airlines
Carry-on size	56 x 36 x 23 cm	56 x 35 x 23 cm
	22 x 14 x 9 in	22 x 14 x 9 in
Personal item	Yes (1 item)	Yes (1 item)
Weight limit	Not specified	Not specified
Carry-on included	Yes	Yes
Strictness level	Moderate	Moderate

Based on official airline policies

Carry-On Size Comparison

At first glance, both airlines look identical—and mostly, they are.

American Airlines

56 x 36 x 23 cm (22 x 14 x 9 inches)
Includes wheels and handles
Slightly wider allowance (36 cm width)

That extra centimeter in width might not sound like much, but it can make a difference with certain suitcase designs.

Delta Airlines

56 x 35 x 23 cm (22 x 14 x 9 inches)
Same height and depth as American
Slightly narrower width (35 cm)

American Airlines vs Delta Airlines Key Differences

The only real variation is 1 cm in width.

In most cases, this won’t matter. But if your bag is right at the limit—especially a hard-shell suitcase—that small difference could affect whether it fits in the sizer.

Practical takeaway:
American Airlines is technically a bit more flexible due to that extra width.

Personal Item Rules Compared

Both airlines allow one personal item, but how they define it differs slightly.

American Airlines

Personal item size: 45 x 35 x 20 cm (18 x 14 x 8 inches)
Must fit under the seat
Examples: backpack, purse, laptop bag

Delta Airlines

Personal item allowed (1 item)
Exact dimensions not specified
Must fit under the seat

What This Means

Delta gives more flexibility on paper since it doesn’t publish strict dimensions. But that doesn’t mean anything goes.

Real-world example:

A slim laptop backpack → accepted on both
A bulky travel backpack → might pass on Delta but get questioned on American if it exceeds their stated size

Warning:
If your bag looks too large to fit under the seat, either airline may treat it as a carry-on.

Weight Limits & Baggage Allowance

Here’s where both airlines align closely.

American Airlines

No official carry-on weight limit
You must be able to lift your bag yourself

Delta Airlines

No published weight restriction
Same expectation: you handle your own bag

Key Insight

This is typical for U.S. airlines.

Unlike many European or Asian carriers:

Weight is rarely checked
Size matters more than weight

Important difference globally:
If you connect to an international airline, you may suddenly face strict weight limits—even if your first flight didn’t check.

Carry-On Fees Comparison

Both airlines include carry-on baggage in most standard fares.

American Airlines

1 carry-on + 1 personal item included
No extra fee for standard economy tickets

Delta Airlines

Same allowance: 1 carry-on + 1 personal item
Included in most fares

When Fees Apply

Fees may apply if:

Your bag exceeds size restrictions
You bring more than allowed items
You check the bag at the gate

In these cases, the bag is treated as checked baggage.

Which Airline Is More Strict?

This is where real-world experience matters more than official numbers.

American Airlines

Uses sizer bins at some gates
Enforcement depends on airport and staff
Moderate strictness overall

Delta Airlines

Less frequent use of sizer bins
More focus on whether bags fit in cabin storage
Slightly more relaxed approach

Verdict on Strictness

Based on traveler experience:

American Airlines is slightly more structured
Delta tends to be a bit more lenient unless the flight is full

That said, both airlines can become stricter during busy boarding.

Real Travel Scenarios

This is where differences show up in real life.

Scenario 1: Same Suitcase on Both Airlines

You’re using a standard 22 x 14 x 9-inch suitcase.

Works on American Airlines
Works on Delta Airlines

No issue here—this is the safest size.

Scenario 2: Backpack vs Suitcase

You carry:

Small suitcase + medium backpack

On American Airlines:

Backpack must fit under seat within stated dimensions

On Delta:

Slightly more flexible if it fits physically

If your backpack is bulky, it may be treated as a carry-on on either airline.

Scenario 3: Connecting Flights

You fly:

American Airlines → international airline

Your bag:

Accepted on American
Rejected on second airline due to stricter size or weight

Warning:
Always follow the strictest airline in your itinerary.

Which Airline Is Better for Carry-On?

Let’s break it down clearly.

Best for Flexibility: Delta Airlines

More relaxed enforcement in many real-world situations.

Best for Defined Rules: American Airlines

Clear personal item size makes expectations easier to follow.

Best Overall

Delta Airlines wins slightly due to its practical flexibility at the airport.

That said, the difference is small—both airlines are very similar.

Related Carry-On Guides

Traveler Insight (Not Official Policy)

From experience, both airlines feel similar until the flight gets crowded.

On full flights, American Airlines staff are more likely to watch bag size closely, especially near the boarding gate. If your bag looks slightly oversized, you may be asked to check it.

Delta, on the other hand, often focuses more on speed during boarding. If your bag fits in the overhead bin without causing delays, it’s usually fine.

Another thing I’ve noticed is that airport location matters. At major hubs, both airlines can be stricter simply because flights are fuller and space is limited.

FAQs

Which airline allows bigger carry-on?

American Airlines allows slightly more width (36 cm vs 35 cm), but the difference is minimal.

Can I use the same bag on both airlines?

Yes, a standard 22 x 14 x 9-inch bag works for both.

What happens if my bag is oversized?

You may need to check it at the gate, and charges may apply.

Do both airlines allow a personal item?

Yes, both allow one personal item.

Are carry-ons included in fare?

Yes, both airlines include a carry-on and personal item in most fares.

Verdict

Winner for flexibility: Delta Airlines  
Winner for structure: American Airlines  
Best overall: Delta Airlines

Data verified from official airline baggage policies.

If you stick to standard cabin baggage size and avoid pushing limits, both airlines will work just fine. The real difference shows up only when your bag is right at the edge.