Flights from Washington to Peterborough

Cheapest flights from Washington

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$508 Roundtrip, found 2 days ago

$508

Roundtrip

found 2 days ago

Select United flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $508 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$514 Roundtrip, found 2 days ago

$514

Roundtrip

found 2 days ago

Select American Airlines flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $514 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$514 Roundtrip, found 2 days ago

$514

Roundtrip

found 2 days ago

Select British Airways flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $514 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$514 Roundtrip, found 2 days ago

$514

Roundtrip

found 2 days ago

Select Virgin Atlantic flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $514 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

DCA

Ronald Reagan Washington National

LHR

Heathrow

$519 Roundtrip, found 2 days ago

$519

Roundtrip

found 2 days ago

Select United flight, departing Wed, Aug 20 from Ronald Reagan Washington National to Heathrow, returning Wed, Sep 3, priced at $519 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$519 Roundtrip, found 2 days ago

$519

Roundtrip

found 2 days ago

Select United flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $519 found 2 days ago

Sun, Nov 16 - Thu, Nov 27

IAD

Washington Dulles Intl.

LHR

Heathrow

$523 Roundtrip, found 6 days ago

$523

Roundtrip

found 6 days ago

Select Icelandair flight, departing Sun, Nov 16 from Washington Dulles Intl. to Heathrow, returning Thu, Nov 27, priced at $523 found 6 days ago

Wed, Aug 20 - Wed, Sep 3

BWI

Baltimore Washington Intl. Thurgood Marshall

LHR

Heathrow

$529 Roundtrip, found 2 days ago

$529

Roundtrip

found 2 days ago

Select Delta flight, departing Wed, Aug 20 from Baltimore Washington Intl. Thurgood Marshall to Heathrow, returning Wed, Sep 3, priced at $529 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

DCA

Ronald Reagan Washington National

LHR

Heathrow

$529 Roundtrip, found 2 days ago

$529

Roundtrip

found 2 days ago

Select Delta flight, departing Wed, Aug 20 from Ronald Reagan Washington National to Heathrow, returning Wed, Sep 3, priced at $529 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$531 Roundtrip, found 2 days ago

$531

Roundtrip

found 2 days ago

Select Brussels Airlines flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $531 found 2 days ago

Wed, Sep 10 - Wed, Sep 17

IAD

Washington Dulles Intl.

LHR

Heathrow

$563 Roundtrip, found 5 days ago

$563

Roundtrip

found 5 days ago

Select TAP Portugal flight, departing Wed, Sep 10 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 17, priced at $563 found 5 days ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$578 Roundtrip, found 2 days ago

$578

Roundtrip

found 2 days ago

Select Air France flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $578 found 2 days ago

Tue, Aug 19 - Fri, Aug 22

IAD

Washington Dulles Intl.

LHR

Heathrow

$601 Roundtrip, found 10 hours ago

$601

Roundtrip

found 10 hours ago

Select Scandinavian Airlines flight, departing Tue, Aug 19 from Washington Dulles Intl. to Heathrow, returning Fri, Aug 22, priced at $601 found 10 hours ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$636 Roundtrip, found 2 days ago

$636

Roundtrip

found 2 days ago

Select Swiss International Air Lines flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $636 found 2 days ago

Fri, Aug 22 - Sun, Aug 24

IAD

Washington Dulles Intl.

LHR

Heathrow

$658 Roundtrip, found 10 hours ago

$658

Roundtrip

found 10 hours ago

Select KLM flight, departing Fri, Aug 22 from Washington Dulles Intl. to Heathrow, returning Sun, Aug 24, priced at $658 found 10 hours ago

Tue, Aug 19 - Sat, Aug 23

DCA

Ronald Reagan Washington National

LHR

Heathrow

$667 Roundtrip, found 10 hours ago

$667

Roundtrip

found 10 hours ago

Select JetBlue Airways flight, departing Tue, Aug 19 from Ronald Reagan Washington National to Heathrow, returning Sat, Aug 23, priced at $667 found 10 hours ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$699 Roundtrip, found 2 days ago

$699

Roundtrip

found 2 days ago

Select Austrian Airlines flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $699 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

DCA

Ronald Reagan Washington National

LHR

Heathrow

$729 Roundtrip, found 2 days ago

$729

Roundtrip

found 2 days ago

Select Finnair flight, departing Wed, Aug 20 from Ronald Reagan Washington National to Heathrow, returning Wed, Sep 3, priced at $729 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$772 Roundtrip, found 2 days ago

$772

Roundtrip

found 2 days ago

Select Lufthansa flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $772 found 2 days ago

Wed, Aug 20 - Wed, Sep 3

IAD

Washington Dulles Intl.

LHR

Heathrow

$784 Roundtrip, found 2 days ago

$784

Roundtrip

found 2 days ago

Select Aer Lingus flight, departing Wed, Aug 20 from Washington Dulles Intl. to Heathrow, returning Wed, Sep 3, priced at $784 found 2 days ago