Upgrade Pro vs ExpertFlyer
The longest-running seat and award tool in the category. Here's the honest difference.
ExpertFlyer is the veteran. It watches airline inventory across far more carriers than we do and tells you the moment a seat, fare class, or award opens up. If what you need is "alert me when F opens on this exact flight," it does that well and it has done it for twenty years.
Where it stops is the part we started with. ExpertFlyer tells you a seat exists. It doesn't tell you whether you will get it — that depends on how many elites are ahead of you on the upgrade list, and an inventory alert can't see the list.
| What you get | ExpertFlyer | Upgrade Pro |
|---|---|---|
| What you get | An alert when inventory or a fare class opens | A calibrated probability that you clear the upgrade list, with an honest range |
| Airline coverage | Broad — most major global carriers | Four US carriers: United, Delta, American, Alaska |
| Comparing departures | One flight at a time, per alert | Five days at a glance, every departure scored side by side |
| Published accuracy | No accuracy metrics published | ROC-AUC 0.91 and Brier 0.112, graded against gate outcomes in public |
| United PZ / PN | Fare-class inventory, including upgrade buckets | PZ and PN by name, with timing built around the 96-hour window |
| Price | About $5.99–$10.99/month depending on tier and term | $8.99/month, or free for your first searches with no card |
Competitor pricing and features verified from their public pages on September 13, 2026. If something here is out of date, tell us and we'll fix it.
You fly carriers we don't cover yet, or you want award-space and fare-class alerts across a lot of airlines. That's a genuinely different job, and they do it better than we do.
You fly United, Delta, American, or Alaska with elite status, and the question keeping you up isn't "is a seat open" but "am I actually going to clear."
Is Upgrade Pro a replacement for ExpertFlyer?
Not exactly — they answer different questions. ExpertFlyer tells you when inventory opens across a wide set of airlines. Upgrade Pro tells you your calibrated odds of clearing the upgrade list on United, Delta, American, and Alaska. Plenty of people run both: the alert tells you something changed, the probability tells you whether it matters for you.
Does Upgrade Pro cover as many airlines as ExpertFlyer?
No. ExpertFlyer covers far more carriers. Upgrade Pro covers four US airlines — United, Delta, American, and Alaska — because upgrade-list prediction needs deep per-airline data, not broad coverage.
How much does Upgrade Pro cost compared to ExpertFlyer?
Upgrade Pro is $8.99 a month, with a free tier that needs no card and no account for your first search. ExpertFlyer runs roughly $5.99 to $10.99 a month depending on tier and billing term.
Does ExpertFlyer publish how accurate it is?
It does not publish accuracy metrics, and it does not really need to — it reports inventory rather than predicting an outcome. Upgrade Pro makes predictions, so it publishes a ROC-AUC of 0.91 and a Brier score of 0.112, and grades every prediction against what happened at the gate.
Try it against your next flight.
Your first search needs no account and shows every flight on the route, scored.
First search free, no account · then 3 more and a tracked trip · no card required