$584 - Direct Roundtrip Flights to Paris from Washington DC on Air France
Air France is offering direct roundtrip flights to Paris from Dulles Airport for $584 including all taxes and fees.
The cheapest flights are on Tuesdays and Thursdays, and flights are in November.
As an alternative, you can fly with KLM Airlines, which offers flights at $608. Their flights have a single layover and can last about twice as long.
Delta also offers direct flights to Charles de Gaulle airport in Paris for $585.
If I had to choose between Delta and Air France, I’d choose Air France every time.