Which global data subscription plan actually works for aircrew?

This scenario may be all too familiar: You touch down in Frankfurt after a nine-hour red-eye, flip off airplane mode, and stare at a spinning wheel while your phone tries to figure out where it is. Maps won’t load. Your Uber request times out. The crew WhatsApp group shows “connecting…” for two full minutes. Meanwhile, you’ve got eight hours before your next sector and no idea how to get to the layover hotel.

For most people, spotty data abroad is annoying. For flight crew, it’s an operational problem. Pilots coordinate last-minute schedule swaps. Cabin crew sort layover logistics in unfamiliar cities. Everyone tries to reach family across time zones. Reliable connectivity isn’t just a luxury, but a necessary infrastructure.

Global data subscription plans promise to fix this. One plan, one monthly fee, coverage everywhere you fly. No more hunting for local SIMs in airport convenience stores. No more memorizing which carrier works in which country. However, the words “global” and “unlimited” are doing a lot of heavy lifting in most of these marketing pitches.

Holafly’s research team set out to answer that question. Using a consistent, quantitative methodology and publicly available information from each provider’s website (all last verified in March 2026), they put three global data plans head to head: Holafly Unlimited, Saily Ultra Premium, and Google Fi Unlimited Premium. 

Each was scored out of 10 across seven categories that actually matter to pilots and cabin crew, for a total of 70 points, based on practical usability for non-US global travelers, transparency of terms, and real-world impact on daily travel experience.

The three plans at a glance

Before getting into scoring, it helps to understand what each plan actually is and who it’s built for.

Take note of the “Who can sign up” row. Google Fi requires a US billing address and US residency. If you’re based in London, Sydney, Toronto, or Munich, it’s simply not an option. For the rest of this comparison, keep that restriction in mind whenever Google Fi scores well on paper.

Data and speed: what “unlimited” actually means at 02:00 in a Bangkok hotel

The scenario: You’re a long-haul cabin crew member on a four-day rotation:  London to Bangkok, 36-hour layover, then Bangkok to Sydney. On your layover day, you video-call your partner back home, stream a show to wind down, pull up maps and restaurant recommendations, and download your updated roster PDF. You burn through about 8 GB in a single day.

What happens next depends entirely on your plan.

Holafly’s daily reset model is the key differentiator here. Even if you hammer the data on a long layover day, your speeds bounce back the next morning. You’re never penalized for a single heavy day across the rest of your trip.

Saily’s 30 GB monthly cap sounds generous until you do the math. A cabin crew member crossing three or four countries in a week, using maps, ride-hailing, video calls, and streaming during downtime, could realistically hit that threshold in under two weeks. Once you do, you’re stuck at 1 Mbps until your billing cycle resets. That’s enough for basic messaging, but forget about using anything media-heavy.

Google Fi gives you more runway at 100 GB, but when you hit the wall, the drop is brutal — 0.256 Mbps. At that speed, Google Maps barely functions. Ride-hailing apps time out. You’re essentially back to the spinning-wheel problem you were trying to avoid.

Hotspot and multi-device usage: sharing data when the hotel Wi-Fi is hopeless

The scenario: You’re a pilot on a 24-hour layover in São Paulo. The hotel Wi-Fi crawls. You need your laptop online to review NOTAMs, check weather briefings, and file your expenses before the deadline. Your colleague in the next room asks if they can tether off your phone too.

Holafly’s hotspot follows the same daily-reset logic as its core data plan. A heavy tethering session today doesn’t degrade your hotspot speeds tomorrow. For crew who regularly use their phone as a portable router for laptops, tablets, or sharing with colleagues, this consistency matters.

Saily’s hotspot is technically unlimited, but it draws from the same 30 GB monthly pool. Once that’s gone, your hotspot connection drops to 1 Mbps too. Google Fi allocates 50 GB specifically to hotspot, which is solid, but it shares the same high-speed data pool, and post-cap speeds make tethering nearly unusable.

Phone number and communication: the verification code problem

The scenario: You land in Toronto after a transatlantic flight. You open your banking app to check a transfer and it wants an SMS verification code. You try to book an Uber from the airport, but the app needs to send you a text to confirm your number. You call the layover hotel to confirm late check-in. No working number.

This is where Saily’s “pure data” approach becomes a real limitation. No phone number means no SMS verification codes, no fallback for two-factor authentication, and no easy way to contact local services that expect a phone number.

Google Fi offers the most complete telephony package, but again, US residents only, and cellular calling to 50 destinations works only when you’re physically in the US.

Holafly bridges the gap with an option to select US, UK, and Canada numbers that users can access for inbound SMS. This covers the majority of real-world verification and communication needs without requiring a second SIM or a separate VoIP app. For the verification purposes, the numbers work also outside of those origin countries making the feature useful across the globe.

Coverage: country count vs. countries that matter to you

The scenario: You fly a mixed long-haul and regional pattern. One month it’s the usual JFK–LHR–CDG rotation. Next, you’re covering for someone on the Doha–Colombo–Male route. Your plan needs to work in Frankfurt and in Fiji.

Google Fi technically covers most countries, but the US-residency gate makes that number inconvenient for most international crew.

Between the two globally accessible options, Holafly covers roughly 40 more destinations than Saily. That gap shows up when you’re flying less common routes like smaller island nations, parts of Central Asia, or African destinations where Saily’s network simply doesn’t reach.

Holafly also offers something neither competitor has: Always On backup data. Even if you cancel your subscription entirely, you retain 1 GB per month of emergency data across 70+ countries, indefinitely. It’s not enough to stream video, but it’s enough to pull up a map, send a message, or call a ride when you land somewhere unexpected. For crew dealing with diversions, reroutes, or gaps between billing cycles, that safety net is genuinely useful.

Price: cheaper isn’t always cheaper

On price alone, Saily wins. Its quarterly plan comes in at $47.99/month — the lowest of the three. Holafly’s annual plan narrows the gap at $50.58/month, and both are free of additional taxes or hidden charges.

Google Fi is the most expensive option in practice. The $65 base price balloons to $71–$78/month after mandatory US government fees, with no long-term discount available.

But price tells only part of the story. Holafly’s monthly fee includes a phone number and Always On backup data, features you would need to pay for separately with Saily (which offers neither) or that simply aren’t available with Google Fi outside the US. Whether that justifies the roughly $3/month difference between Holafly and Saily depends on how much you value those extras.

Customer support: because things break at 03:00 local time

The scenario: You’re in Osaka. It’s the middle of the night back home. Your eSIM profile isn’t activating after a device restart. Your next pickup is in four hours. You need help now, not during London business hours.

All three offer round-the-clock support, but the way you reach that support varies.

Holafly gives you both live chat and email, which are useful when your app isn’t loading properly and you need an alternative way in. With over 81,000 Trustpilot reviews at 4.6 stars, it also has the largest publicly verifiable support track record of the three.

Saily limits support to in-app chat. When things work, that’s fine. When the app itself is the problem, or connectivity is too degraded to load it, you’re stuck. Its Trustpilot score (4.7 from 13,300+ reviews) is strong but based on a smaller sample.

Google Fi’s support satisfaction data isn’t publicly available on Trustpilot, making it harder to evaluate independently.

Unique perks: the extras that tip the balance

Saily wins on sheer volume of bundled extras. The NordVPN suite adds legitimate security value, and airport lounge access is a welcome bonus for anyone spending significant time in terminals.

Google Fi’s perks: cloud storage and YouTube Premium, are nice for personal use but aren’t solving travel-specific problems.

Holafly’s standout perk is narrower but directly relevant: the Always On backup data. It’s the only feature among all three plans that keeps working even after cancellation, and it directly addresses the connectivity gaps that crew face during unexpected schedule disruptions.

Final scores

So which plan actually works best for flight crew?

Google Fi is a good phone plan for US-based travelers who stay mostly within the Google ecosystem. But the residency requirement alone disqualifies it for a huge portion of international flight crew. Anyone based in the UK, Australia, Canada, Germany, or anywhere else outside the US simply cannot sign up. Even for US-based crew, the post-cap speed of 0.256 Mbps makes it unreliable once you’ve burned through your high-speed data.

Saily is the budget pick, and a reasonable one if your monthly data usage consistently stays under 30 GB. The bundled security tools and airport perks add real value. But the moment you cross that 30 GB threshold which is very possible on a multi-country, multi-week rotation, your experience degrades for the rest of the billing cycle. No phone number and no backup coverage mean fewer fallback options when things go sideways.

Holafly lands the highest overall score because it solves the specific problems crew face most often: unpredictable data needs that vary day to day, connectivity across a wider range of destinations, a phone number that works outside the US, and a support system with proven scale. The daily-reset throttling model is the single biggest differentiator because it means one heavy data day won’t wreck the rest of your trip.

Holafly is offering a 50% discount for airline employees, available through this link. For AeroTime readers outside the airline industry, we have a 10% discount using the code HOLAFLY_AEROTIME_10 at checkout here.

For pilots and cabin crew flying out of hubs in the US, UK, Australia, Canada, or main cities in Europe where rotations regularly cross dozens of countries per month, that kind of consistency is what separates a plan that technically works from one you can actually rely on.

Research conducted by Holafly’s internal research team, following a consistent and quantitative methodology based on publicly available information from each provider’s website.

The views and opinions expressed in this article are solely those of the author and do not necessarily reflect the official policy or position of AeroTime. 

Sources
Holafly Plans: https://esim.holafly.com/plans
Holafly Always On: https://esim.holafly.com/plans/always-on
Saily Ultra: https://saily.com/esim-ultra-plan + Saily T&C (throttling confirmed at 30 GB): https://saily.com/es-419/legal/terms-of-service/
Google Fi: https://fi.google.com/about/plans
Data last verified March 2026.