Not all cruise lines offer in-trip oxygen, but some do provide it upon request. Here are a few cruise lines that offer in-trip oxygen:

1. Royal Caribbean International – Guests who require oxygen should notify the Access Department at the time of booking and provide a physician’s statement. Oxygen may be provided onboard for an additional fee.
2. Holland America Line – Oxygen equipment and oxygen supply may be provided onboard for an additional fee with advance notice.
3. Norwegian Cruise Line – Oxygen can be provided onboard with advance notice and for an additional fee. A physician’s statement is required.
4. Princess Cruises – Oxygen equipment and supply can be arranged for an additional fee with advance notice. A physician’s statement is required