85% capacity is the magic number for Blue Garage access.
When William P. Hobby’s total garages hit 85% full, Blue Garage flips to “reservation only” just like Red Garage. Drive-up parkers sometimes get turned away at that point, so last-minute arrivals on busy Fridays or holidays run a real risk of being blocked from the garage entirely.
Blue Garage sits on-airport at HOU, serving Terminal 1, with direct pedestrian access into the terminal level via covered walkways. You’re parking in a structure that’s a short walk from check-in and TSA, so you skip shuttles and can be at the Southwest counters in roughly 5–7 minutes from a mid-level floor.
Rates track the other on-airport garages at Hobby, with daily pricing that’s higher than off-site lots but far lower than missing a flight and buying a walk-up fare. The trade-off: you pay more than the remote economy options, but you cut out the 10–15 minute shuttle ride to Terminal 1 that comes with most off-airport parking.
Regulars who favor Blue Garage often switch to pre-booked off-airport lots on peak weeks like Spring Break or Thanksgiving. They’ve been burned by the 85% rule before and now only use Blue Garage during normal weekdays or when they’ve locked in an advance reservation directly through the airport’s parking system.
Watch out for full-garage signs at the HOU access roads when big events or weather disruptions hit Houston. Those signs usually mean Blue and Red are already throttled to reservations, pushing drive-up parkers to surface lots or farther-flung providers that can add 20–30 minutes to your airport arrival timeline.
Tip: If you care about parking in Blue Garage, book a garage reservation at least 24–48 hours before a known peak day; treat drive-up as a backup plan, not the main strategy.