A smarter way to fly
The decision intelligence layer for smarter flying.
Compare cash fares, miles, and blended payments — and understand the smartest way to book your next trip.
Cash is 67% below the typical fare. Better than redeeming miles.
- Typical DOH → EDI fare is $970 — today's $318 is a rare window.
- 45,000 miles here would be worth only ~0.5¢ each.
- Keep your miles for a redemption that pays more.
Other tools show you flights. AERLYN tells you how to book them.
A conventional travel site
- Here are 847 flights.
- Sort by price, stops, or airline.
- Pick one.
AERLYN
- Cash: $318 · Miles: 45,000 mi + $92
- Cash is $652 below the typical fare.
- AERLYN Verdict: Pay Cash. Save your miles.
The problem
Miles and cash live in different worlds.
Your decision shouldn't.
How it works
One trip. Two currencies. One clear answer.
Tell us how you travel
Home airport, destinations, cabin, budget and flexibility.
Add your loyalty balances
Enter balances manually. No airline passwords required.
AERLYN watches
We monitor fares and award space that match your profile.
Get the verdict
Pay Cash · Use Miles · Top Up · Wait. Book direct with the airline.
Example decision
Cash fareDirect with Qatar
$742Miles optionWorth ~$580 in value
42,500 Avios + $128BlendedWorth ~$427 saved
25,000 Avios + $315Saves $427 versus full cash. Keeps 17,500 Avios available. Strong redemption value for this route.
Personalization
Deals that make sense for you.
AERLYN ranks opportunities using your routes, loyalty balances, flexibility and budget — not by what's cheapest for everyone.
Sara · Doha · Top 10 for You
Deal types
From everyday value to rare opportunities.
Deal
A meaningful reduction from normal pricing.
Flash Deal
Strong price movement with a potentially short window.
Mega Deal
Exceptional savings, especially in premium cabins.
Phantom Fare
Rare pricing that may disappear quickly.
Cash + miles
Your miles aren't free.
AERLYN treats miles as real economic value. Every comparison is honest, and every verdict shows you exactly why.
Sometimes the smartest use of your miles is not using them.
Flexibility
Flexibility changes the answer.
The more flexibility you give AERLYN, the more opportunities it can surface across dates, destinations and nearby airports.
Alerts
The opportunity comes to you.
When AERLYN finds a match, you hear about it instantly — through push notifications, Telegram, or email.
Transparency
The reasoning is part of the product.
Prices and award availability can change. AERLYN shows when an opportunity was last verified and exactly why it was recommended.
Verified at timestamp
Every deal shows exactly when it was last confirmed.
Confidence level
We tell you how confident we are in the data.
Cash baseline
Every fare is compared to a verified historical average.
Award comparison
Real award pricing matched to your loyalty programme.
Transparent reasoning
Every verdict includes the logic behind it.
No stored passwords
Balances entered manually. We never touch airline accounts.
What AERLYN does not do
Simple by design.
- AERLYN does not sell tickets.
- AERLYN does not hold your money.
- AERLYN does not store airline passwords.
- AERLYN does not redeem miles for you.
You always book directly with the airline or loyalty programme.
AERLYN gives you the verdict. You decide. You book.
Join Early Access →For airlines & loyalty programs
Turn traveller intent into smarter conversion.
AERLYN connects purchase intent with airline fares, loyalty inventory and campaigns — delivering travellers at the moment of decision.
Partner with AERLYN →Reach travellers comparing cash vs miles — the highest-value moment.
Surface your promotions to travellers with the right balance and intent.
AERLYN never books for users — every conversion lands directly with you.
Early access
Stop searching.
Start deciding.
Cash. Miles. Timing. One clear answer.
goaerlyn.com