Flights from Seattle to London from US$ 729.99

For flights from Seattle (SEA) to London Heathrow (LHR), the lowest prices occur in January, mid-April and November. These months fall outside the main summer peak and are priced lower than high season. Within a week, Thursday departures are cheaper than Sunday departures on this route. Focusing on these months and a Thursday departure helps reduce the overall flight cost.

Flights from Seattle (SEA) to London Heathrow (LHR) are operated with one connection via Frankfurt (FRA). The long-haul flight from Seattle (SEA) to Frankfurt (FRA) takes about 10 hours, and the onward flight from Frankfurt (FRA) to London Heathrow (LHR) takes about 1 hour 45 minutes.

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, Economy Class passengers are served a complimentary Taste the World Standard Menu and a snack, together with free soft and hot drinks throughout the flight. Additional snacks and alcoholic beverages are available for purchase. Premium Economy Class on this route adds enhanced meals and drinks, while Business Class features the Taste the World Gourmet Menu with an expanded selection of beverages. Onboard amenities and services on the connecting flight from Frankfurt (FRA) to London Heathrow (LHR) may differ from the long-haul part of the journey.

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, Business Class provides a lie-flat seat that reclines to a fully flat bed about 6 ft 6 in long, each with direct aisle access, a large 17.3" 4K screen, USB-A/C ports and a power socket. Business Class includes an increased cabin baggage allowance of 16 kg, free checked baggage of 2 × 32 kg on USA routes and one piece of sports equipment up to 30 kg with registration. The onboard service features the Taste the World Gourmet Menu with two carefully selected menus and a snack on day flights, a wide selection of alcoholic and non-alcoholic drinks, a welcome drink, premium entertainment, a high-quality travel kit and noise-cancelling headphones. Lounge access at participating airports and priority services for check-in, boarding, baggage and security screening are also part of the Business Class offering. Onboard amenities and services on the connecting flight from Frankfurt (FRA) to London Heathrow (LHR) may differ from the long-haul part of the journey.

Flights from Seattle (SEA) to London Heathrow (LHR) with Condor operate as one-stop connections via Frankfurt (FRA). In the summer period, the Condor long-haul flight from Seattle (SEA) to Frankfurt (FRA) runs on Monday, Thursday, Friday, Saturday and Sunday, with onward flights from Frankfurt (FRA) to London Heathrow (LHR) on the same days; in the winter period, the long-haul flight operates on Monday, Thursday and Saturday, again with onward flights from Frankfurt (FRA) to London Heathrow (LHR) on those days.

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, Wi-Fi is available through the FlyConnect service. Passengers can purchase internet packages with different data volumes for messaging, browsing or streaming, with charges applied according to the selected package. Use of onboard Wi-Fi for voice calls is restricted in line with flight regulations. Onboard Wi-Fi on the connecting flight from Frankfurt (FRA) to London Heathrow (LHR) may differ from the long-haul part of the journey and depends on the aircraft and operating airline.

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, extra legroom seats can be reserved in advance as part of the Seat reservation options. Passengers can choose between standard seats and extra legroom seats and reserve them up to 48 hours before departure or during online check-in, with prices depending on the specific seat and route. Exit-row extra legroom seats have additional safety conditions, so they are not available to infants and children under 14, passengers travelling with pets in the cabin, expectant mothers, passengers with certain physical or mental limitations or those unable to assist in an emergency. Seating options on the connecting flight from Frankfurt (FRA) to London Heathrow (LHR) may differ depending on the aircraft and operating airline.

For flights from Seattle (SEA) to London Heathrow (LHR), lower prices occur when booking around eight months before departure. A second good booking window is about five weeks before departure, when prices are lower than for last-minute purchases on this route. Bookings made very close to departure are higher in price than those made around these advance-purchase points.

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, three travel classes are offered: Economy Class, Premium Economy Class and Business class. Economy Class features ergonomic seats with personal 13.3" 4K screens, USB-A/C ports, Bluetooth for headphones and the Taste the World Standard Menu with complimentary soft and hot drinks. Premium Economy Class adds more legroom and seat recline, increased baggage allowances and enhanced dining and beverage options. Business Class provides fully flat beds with direct aisle access, larger 17.3" screens, increased baggage allowances, lounge access and the Taste the World Gourmet Menu. The onward European flight from Frankfurt (FRA) to London Heathrow (LHR) may offer a different cabin configuration and service concept depending on the operating airline.

For the long-haul part of the Seattle (SEA) to London Heathrow (LHR) journey between the United States and Europe, Condor’s baggage policy depends on the booked fare and travel class. In Economy Classic, Economy Green and Economy Flex, adults and children receive 8 kg cabin baggage plus one checked bag up to 23 kg, while some lower Economy fares include 8 kg cabin baggage but no free checked baggage. Premium Economy Class includes 10 kg cabin baggage and one checked bag up to 32 kg, and Business Class includes 16 kg cabin baggage and two checked bags up to 32 kg each. For all fares, each checked bag must not exceed total dimensions of 158 cm (length + width + height), and any single bag over 32 kg (70 lb) cannot be accepted. Additional baggage packages can be booked in advance up to 8 hours before departure, and Sports equipment must also be registered in advance, with Business Class including one piece of sports equipment up to 30 kg. If the itinerary includes connecting flights operated by other airlines, their baggage rules can differ and may apply to those parts of the journey.