Hi there! I understand you're experiencing an issue where the Expedia app on your iPhone shows a blue screen with a loading circle but then freezes, even after uninstalling and reinstalling the app. That sounds inconvenient.

Just to make sure I get the full picture—have you tried restarting your iPhone after reinstalling the app? Also, is your internet connection stable and do other apps load without trouble?

Meanwhile, here’s a step-by-step approach we can try to resolve this:

1. Force Close the Expedia App: Double-tap the Home button or swipe up from the bottom (depending on your iPhone model) to open the app switcher. Swipe the Expedia app off the screen to close it completely.

2. Check Your Internet Connection: Try switching between Wi-Fi and cellular data to rule out any network issues.

3. Restart Your iPhone: Press and hold the side button along with the volume button, then slide to power off. Turn it back on after a minute.

4. Check for iOS and App Updates: Since you're on iOS 17.2.1, confirm that both the OS and the Expedia app are updated to the latest version in Settings > General > Software Update and the App Store, respectively.

5. Clear Cache or Reset App Data: iOS apps don’t have a direct cache clearing option, but uninstalling usually helps. Since you already reinstalled, let’s try resetting all settings on your device next:
- Go to Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings. This won’t delete your data but will reset system settings like Wi-Fi passwords and preferences.

6. Check Content & Privacy Restrictions: Sometimes, restrictions can interfere with app functionality.
- Go to Settings > Screen Time > Content & Privacy Restrictions and make sure it’s turned off or configured not to block Expedia.

If the problem persists after these steps, it could be related to a bug or server-side issue. I can assist you further or escalate this for deeper investigation.

Would you like me to guide you through any of these steps? And did anything stand out as already tried or different?