U.S. Department of Transportation · reviewed 2026-10-10
What this source supports: DOT explains consumer rights for delayed, damaged, and lost baggage, and the rules airlines must follow.
Source limit: Airline tariffs and international conventions change the limits. Read your airline's contract of carriage.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
Limits
This guide compares two prices from your own numbers. It does not check airline rules or shipping times.
Airline tariffs and international conventions change the limits. Read your airline's contract of carriage.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Common questions
What does the App compute?
Turn the per-leg bag fee, the leg count, and the round-trip shipping cost into the cheaper option.
What does the App not do?
This App compares two prices from the numbers you enter. It does not check airline rules or shipping times.
Where do the numbers come from?
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
Before you start
Open the linked source page and keep it beside you.
Gather the values the App asks for:
Bag fee per leg in dollars.
Paid legs in the trip.
Round-trip shipping cost in dollars.
Set aside ten quiet minutes; rushed numbers are the main error this guide prevents.
Free Companion App
The App computes the worked example with your own numbers, in your browser.
APP 1
Bag Fee versus Shipping Check
Turn the per-leg bag fee, the leg count, and the round-trip shipping cost into the cheaper option.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.