DUBLIN, July 26 (Reuters) - Ryanair on Monday nudged up its forecast for full-year traffic on strong summer bookings but said fares remained well below pre-pandemic levels as it reported an after-tax loss of 273 million euros ($321.5 million) for the three months to the end of June. The Irish airline, Europe’s largest low-cost carrier, said it expected to fly between 90 and 100 million passengers in its financial year to end-March 2022, up from an earlier forecast of 80-100 million. Ryanair flew 27.5 million passengers in the year to March 2021, down from a pre-COVID-19 peak of 149 million the previous year. ($1 = 0.8490 euros) (Reporting by Conor Humphries; Editing by Jacqueline Wong) Our Standards: The Thomson Reuters Trust Principles.