United Airlines offers select nationwide roundtrip fares with prices starting at $112.70. That's $14 under our June mention and the best rate we've seen for roundtrip fares from United Airlines. It's also the lowest current rate we could find for select routes by $20. This price is valid on flights departing from Houston, TX, (IAH) with arrival in New Orleans, LA, (MSY) on September 10 with return on September 13. A 14-day advance purchase and roundtrip purchase is required. Book this travel deal by July 24 for travel August 25 through October 1. Click here to see more routes.