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The cheapest order to fly London, Paris and Rome from Washington

There are 6 ways to fly these cities. They do not cost the same. The cheapest works out at about $804 a person and the most expensive at $895, a difference of $91 for visiting exactly the same places.

Fly them in this order

Washington → Paris → London → Rome → Washington

About $804 per person in flights, based on fares recently seen on these routes.

Every order, priced

  1. Washington → Paris → London → Rome → Washington$804
    cheapest order
  2. Washington → London → Paris → Rome → Washington$824
    $20 more per person
  3. Washington → Paris → Rome → London → Washington$829
    $25 more per person
  4. Washington → London → Rome → Paris → Washington$838
    $34 more per person
  5. Washington → Rome → London → Paris → Washington$870
    $66 more per person
  6. Washington → Rome → Paris → London → Washington$895
    $91 more per person

Why Paris first

  1. Washington to Paris$304
  2. Paris to London$44
  3. London to Rome$32
  4. Rome to Washington$424
  • Out of Washington, Paris is the cheapest first stop at about $304. Rome would be $360.
  • Going home, Rome is the cheapest city to leave from at about $424, against $460 from London.
  • The dearest order pays $460 for London to Washington, a flight the cheapest order never takes.
  • Rome to Washington is 53% of what the cheapest order spends on flights, so it is the leg to watch.

Between the cities

  • Paris to London: about 340 km (210 miles) as the crow flies. Also by ground: Eurostar, about 2h 20m, usually $60 to $180. Or FlixBus / BlaBlaCar (overnight), about 8h 20m, usually $30 to $60.
  • London to Rome: about 1,430 km (890 miles) as the crow flies. No train or bus we would suggest instead of flying.

Entry rules on a US passport

  • US passport: visa-free in the Schengen area for 90 days in any 180. The Entry/Exit System registers biometrics at the border, and the ETIAS pre-travel authorization may now be required; check the official site. Official source
  • US passport: the UK requires an Electronic Travel Authorisation (ETA) for visa-free visitors, including short visits and landside transit. Apply via the UK ETA app before travel. Official source

Rules change; check the official source for your passport and dates before you book.

How much the order matters here

Getting the order right is worth $91 a person on this trip, 11% of what the cheapest way round costs. Of the 107 trips we price in full, that is number 96 for how much the order matters, one of the smaller gaps: on this trip your dates are likely to matter more than the order.

The same cities from other airports

The cheapest order depends on where you start. From Washington it starts in Paris.

  • From New Yorkstart in Paris, about $615 a person, $55 less than the dearest order
  • From Chicagostart in Rome, about $762 a person, $580 less than the dearest order
  • From Los Angelesstart in Paris, about $769 a person, $89 less than the dearest order
  • From Atlantastart in London, about $911 a person, $157 less than the dearest order

What these numbers are

Cached one-way fares, 12 of 12 legs priced from real observations, put together on November 12, 2026, from fares departing November 12, 2026 onwards. Right for comparing one order with another, not a quote for your dates.

A plan prices your own dates and weighs hours as well as fares, so it can pick a different order from this page.

Other trips priced this way

From Washington

Trips through the same cities

Put dates on it

Same cities on real dates, plus what one search cannot show: layovers long enough to count as a free city, two tickets that beat one, and cheaper days either side. No account and no card.

One press starts it on January 16, 2027 to January 30, 2027, 14 days, for 2 travelers. Our dates, not yours, and about two minutes.

Plan London, Paris and Rome from Washington nowOpen the form instead and pick your own dates

Signed out, 3 trips a day per address, priced from cached fares and the free sources, so some legs may be estimates and the plan says which. Signed in, your first trip also searches Google Flights live, and you can change your trips afterwards.