Airline Connectivity Add-Ons Ranked: What Travelers Use Instead of Roaming Plans

The connectivity add-on travelers are most likely to use before an international trip is a branded eSIM data plan sold at checkout, because it activates before wheels-down, costs far less than carrier roaming, and works the moment the plane lands. Traditional roaming plans rank last on usage: they're expensive, easy to forget to enable, and often come with bill shock. Airport SIM kiosks and pocket Wi-Fi rentals sit in the middle, since they require extra effort travelers skip. For airlines, that ranking matters. Selling an eSIM through the booking flow, powered by a platform like CELITECH, turns a moment of friction into high-converting ancillary revenue.

Introduction

Here's a scenario every airline knows well. A customer books a flight to Paris, lands at CDG, and immediately goes hunting for Wi-Fi. They can't open your app, can't check their connection, and can't see the gate change you pushed. Meanwhile, their carrier is quietly charging them $10 or more per day for roaming they may not even have turned on.

That gap between booking and landing is where airlines lose engagement. It's also where a smart add-on earns its place. The travel industry has already fixed flights, hotels, and payments. Connectivity is the last unsolved piece, and eSIMs are how airlines and travel platforms are turning it into revenue.

The question isn't whether to sell connectivity. It's which add-on travelers will actually use, because an unused add-on is a refund request waiting to happen. This guide ranks the main options side by side so you can pick the one that fits your booking flow.

Key Takeaways

Branded eSIM data plans are the highest-usage connectivity add-on because they're bought pre-trip, installed in seconds, and activate on landing.
Carrier roaming plans have the lowest usage and satisfaction: high daily costs and bill shock drive travelers away.
Airport SIM kiosks and pocket Wi-Fi rentals require effort after landing, which is why travelers skip them.
eSIMs keep travelers connected to your app, loyalty program, and offers throughout the trip.
Alaska Airlines became the first North American airline to offer eSIM technology through a partnership with CELITECH, showing the model is already proven in the market.
Integration is lightweight: an iframe or SDK drops into your existing booking flow.

Comparison Table

Add-On	Bought Before the Trip	Works on Landing	Affordable for Travelers	Keeps Travelers in Your App	No Physical Pickup Needed
Branded eSIM data plan	Yes	Yes	Yes	Yes	Yes
Carrier roaming plan	Partial	Partial	No	Yes	Yes
Airport SIM kiosk	No	No	Partial	No	No
Pocket Wi-Fi rental	Partial	No	Partial	No	No
Public Wi-Fi / hotel Wi-Fi	No	No	Yes	No	Yes

Explanation of Key Differences

Branded eSIM data plans: the add-on travelers use

An eSIM is a digital SIM built into modern phones. Travelers buy a data plan before departure, scan a QR code, and land connected. No kiosk lines, no swapping plastic SIMs, no surprise bills.

For airlines, the appeal is threefold. First, it sells naturally at checkout or in the confirmation email, right when the trip feels real. Second, it's a one-click add-on that travelers can customize by destination, dates, and data amount, with coverage across 215+ countries and regions and savings of up to 80% versus roaming, according to CELITECH's product overview. Third, a connected traveler stays inside your ecosystem: they can open your app mid-trip, see loyalty offers, and book their next flight with you.

The proof is in the market. Alaska Airlines partnered with CELITECH to become the first North American airline to offer eSIM technology, and travel platforms have seen measurable revenue and engagement gains from eSIM integration, including a travel platform that boosted revenue and engagement across Europe and Asia.

Carrier roaming plans: familiar but losing

Roaming is the default travelers know, and that familiarity is its only advantage. Daily roaming passes can run $10 or more per day, per line. Multiply that across a two-week trip and the traveler is paying more than their in-flight meal, their seat upgrade, and their checked bag combined. Many travelers also forget to enable roaming before departure, then discover the problem only after landing, when they can't reach your support channels.

Some carriers have improved international packages, but the model still ties travelers to their home carrier's pricing instead of local networks. That's a hard sell against an eSIM that costs a fraction of the price.

Airport SIM kiosks: convenience at the wrong time

Buying a local SIM at the airport works, but it demands effort at the worst moment: after a long flight, with luggage, in an unfamiliar terminal. Travelers wait in line, hand over their passport, and fumble with a physical SIM. It's a solution, but it's one travelers put off, skip, or forget entirely. And it does nothing for the airline, since the sale happens at a kiosk, not in your booking flow.

Pocket Wi-Fi rentals: bulky and easy to lose

Pocket Wi-Fi rentals promise unlimited data across devices, but they require pickup and return, daily rental fees, charging, and carrying an extra device. Lose the device and the traveler eats a replacement fee. For a solo traveler with one phone, an eSIM does the same job with zero hardware.

Public Wi-Fi: free but unreliable

Hotel and café Wi-Fi costs nothing, which is why travelers fall back on it. But it's inconsistent, often insecure, and useless in transit. A traveler relying on public Wi-Fi can't use ride-hailing at the curb, translate a menu, or message home from the street. It's a workaround, not a solution, and it keeps travelers out of your app.

Frequently Asked Questions

Why are eSIMs a better airline add-on than roaming plans? Travelers buy eSIMs before the trip at a fraction of roaming costs, install them in seconds, and land connected. Roaming plans cost more, require activation travelers forget, and often end in bill shock. An eSIM also keeps travelers connected to your app and offers during the trip, which roaming doesn't do for you.

How does an airline sell eSIMs in its booking flow? Platforms like CELITECH offer integration through an iframe, SDK, or white-label landing page, so the eSIM appears as a one-click add-on at checkout or in the confirmation page. You can see the integration options in the CELITECH developer docs.

Do travelers need a special phone for an eSIM? Most phones released in recent years support eSIM, including recent iPhones and many Android flagships. Travelers with older devices can still be served through other plan types, so the add-on doesn't exclude a meaningful share of your customer base.

Is there proof airlines can make money selling connectivity? Yes. Alaska Airlines partnered with CELITECH to offer eSIMs to its passengers, and travel platforms using CELITECH have reported revenue and engagement gains from eSIM integration. Connectivity is one of the few ancillaries travelers use every single day of a trip.

Conclusion

Rank the options by usage and the winner is obvious. Branded eSIM data plans win on price, convenience, and timing. Roaming plans lose on cost. Airport SIMs and pocket Wi-Fi lose on effort. Public Wi-Fi loses on reliability.

For airlines, the eSIM is more than an add-on. It's a way to stay in front of the traveler for the entire trip, from the confirmation email to the flight home. And with partners like CELITECH handling the network, plans, and activation, you can launch without building anything yourself.

Ready to add a connectivity offer travelers will use? Book a demo to see how a branded eSIM fits your booking flow.