Web
Extension on Airline Websites
The MileIntel extension activates on supported airline sites — see your balance, upgrade availability, and booking tips inline.
Overview
Beyond Google Flights, the MileIntel extension activates on supported airline websites. When you're browsing flights on united.com or delta.com, the extension overlays relevant loyalty data without disrupting the booking flow.
Supported Airlines
| Airline | Website | Features |
|---|---|---|
| United | united.com | Balance, upgrade availability, MileagePlus tips |
| Delta | delta.com | Balance, SkyMiles valuations, upgrade list position |
| American | aa.com | Balance, AAdvantage insights, systemwide upgrade tracking |
| Southwest | southwest.com | Rapid Rewards balance, point valuations |
| Alaska | alaskaair.com | Mileage Plan balance, partner award options |
| JetBlue | jetblue.com | TrueBlue balance, point valuations |
What You See
On airline booking pages, the extension adds:
- Your balance for that airline's loyalty program, pulled from your MileIntel wallet. No need to log into the airline site separately to check.
- Upgrade indicators — on fare selection pages, a badge shows whether upgrade inventory is available for each fare class.
- Booking tips — contextual suggestions like "Book this fare class to earn 150% elite miles" or "This route has a transfer sweet spot via Chase UR."
Key Details
- The extension only activates on flight search and booking pages — not the airline's homepage, blog, or account settings.
- It reads page content to identify flights but never submits forms or makes purchases on your behalf.
- Airline site layouts change occasionally. If the overlay looks off, update the extension — fixes ship within days.
Tips
- Use the extension alongside the airline's own award search. MileIntel can spot transfer partner options that the airline's site won't show you.
Last updated March 22, 2026
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