Hi there! I understand you're having trouble selecting the carry-on baggage option in the Aer Lingus app. To help you better, could you tell me at what stage of the booking or check-in process you're trying to select the carry-on option? Also, have you noticed if the option is greyed out, missing, or giving any error messages?

Sometimes, the carry-on option can be limited based on the fare type or if it’s sold out for a specific flight. Let’s start by checking a few things together:

1. Fare Type Check:
Certain fare types, like the basic Saver fare, might not include carry-on baggage by default. Can you confirm what fare type you booked?

2. App Update:
Make sure your Aer Lingus app is up to date on your iPhone iOS 18.4.1. Sometimes, older app versions can have bugs or issues displaying options.

3. Carry-on Allowance Rules:
For Aer Lingus, the standard carry-on allowance is usually 7kg for regional flights or 10kg on transatlantic flights. Are you traveling regionally or long-haul? Occasionally, the carry-on option may be automatically included and not selectable as an extra if it’s part of your fare1.

4. Try Re-logging:
Log out of the app, close it entirely, and log back in. Sometimes session refresh helps in showing all options properly.

5. Alternative Step:
If the app still doesn't show the option to add or select carry-on baggage, try logging in on the Aer Lingus website via your iPhone browser and see if the option is available there.

If after these steps you still can't select the carry-on option, please let me know what you’ve tried and any messages or visual cues you see so we can dig deeper or escalate if needed. How does that sound?

the step “add bag” doesn’t work itvus the first time in years this is happening don’t know why

Thanks for sharing that—it definitely helps to know that the “Add bag” option just stopped working for you, especially after years without issues. Let’s try a few things to get this sorted on your iPhone running iOS 18.4.1.

1. Clear the App Cache and Restart
Although iOS apps don’t have a direct cache-clear option like Android, you can try to force close the Aer Lingus app entirely (swipe it up from the app switcher), then restart your phone. This refresh can often clear temporary glitches.

2. Update the App
Please check the App Store to confirm you have the latest version of the Aer Lingus app. Even a recent update might have fixed bugs related to managing bags.

3. Try Manage Booking via Browser
Since the app’s “Add bag” feature is malfunctioning, try going to the Aer Lingus website on your iPhone Safari browser instead. Log in to “Manage Booking” and see if you can add your bags there. Sometimes the web interface handles these changes more smoothly when app features bug out, as noted by users who had to phone otherwise1.

4. Confirm Flight Operator
If your Aer Lingus flight or part of your journey is operated by a partner airline (such as British Airways), there can sometimes be issues adding bags online. This situation sometimes triggers error codes or blocks adding luggage in advance2. If this is your case, let me know so I can assist with next steps.

5. Contact Support as a Backup
If none of the above work, contacting Aer Lingus customer support might be necessary to add bags manually to your booking. You can email [email protected], or I can guide you on how to get in touch via phone.

Could you try those steps, especially the browser method, and let me know what happens? We’ll get this fixed for you.