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How to get from Boise to London

No nonstop flights. The fastest way is via Portland: about 13h 5m including the connection. Other options: via Seattle, Las Vegas, Phoenix and San Francisco. Two tickets from $742.

Flights from Boise to London

Pick a departure date to see flights and seller prices

We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.

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Best fares from Boise to London

Lowest one-way prices found by recent searches for the next 120 days; press a card to search that date

Cheapest one-way $435 16 December 2026, with a connection Cheapest month December 2026 tickets from $435

Where to connect

Options with one connection, fastest first

fastest, via Portland
13h 5m
two tickets, via San Francisco
$742
connection options
5
straight-line distance
4,837 mi (7,785 km)
fastest
Via Portland
13h 5m
with the connection
Boise to Portland flight 30m
Connection of about 3h
Portland to London flight 9h 35m
Via Seattle
14h 20m
with the connection
Boise to Seattle flight 1h 47m
Connection of about 3h
Seattle to London flight 9h 33m
Via Las Vegas
14h 45m
with the connection
Boise to Las Vegas flight 1h 50m
Connection of about 3h
Las Vegas to London flight 9h 55m
two ticketsfrom $764
Via Phoenix
15h 5m
with the connection
Boise to Phoenix flight 2h 10m
Connection of about 3h Arrival: Phoenix Sky Harbor International, Phoenix-Mesa Gateway. Departure to London: Phoenix Sky Harbor International.
Phoenix to London flight 9h 55m
two ticketsfrom $1,114
Via San Francisco
15h 25m
with the connection
Boise to San Francisco flight 1h 55m
Connection of about 3h Arrival: Metropolitan Oakland International, Norman Y. Mineta San Jose International, San Francisco International. Departure to London: San Francisco International.
San Francisco to London flight 10h 30m
two ticketsfrom $742

One ticket or two

How the options are calculated and what to keep in mind at the connection

Flight times come from the nonstop schedule (estimated from the distance where there is no schedule), with 3h allowed for the connection. The price of an option is the sum of the lowest known fares for each leg; their dates may not match, so treat it as a guide. The search shows tickets for your dates, including connections on a single ticket.

When to visit London

Weather by month

Best time to visit: May, June, July, August and September, +18° to +23° by day. In November it is +11° by day and +6° at night, with 11 rainy days.

Jan
+7° +2° 12 days
Feb
+10° +3° 11 days
Mar
+12° +4° 12 days
Apr
+14° +5° 8 days
May
+18° +9° 13 days
Jun
+22° +12° 8 days
Jul
+23° +14° 13 days
Aug
+23° +14° 7 days
Sep
+20° +12° 12 days
Oct
+16° +10° 13 days
Nov
+11° +6° 11 days
Dec
+9° +5° 12 days

Daytime and night temperatures in °C, rainy days. Months with the most comfortable weather are in green. Long-term averages.

Nearest nonstop flights

The closest you can get without a connection

Frequently asked questions

Is there a nonstop flight from Boise to London?
There are no nonstop flights in the schedule. You will need a connection, the fastest is via Portland.
What is the fastest way to fly from Boise to London?
Via Portland: 30m to the connection, 9h 35m after it, about 13h 5m in total with 3h for the connection.
How much does a flight from Boise to London with a connection cost?
Two nonstop tickets via San Francisco from $742. This is the sum of the lowest known prices for each leg, and their dates may not match.
Which cities can you connect in between Boise and London?
Portland (13h 5m total), Seattle (14h 20m total), Las Vegas (14h 45m total), Phoenix (15h 5m total) and San Francisco (15h 25m total).
How far is London from Boise?
4,837 mi (7,785 km) in a straight line between the cities.
How much time should I allow for the connection?
The options allow 3h. On a single ticket the carrier is responsible for the connection; on separate tickets you set the margin yourself, allowing time to collect and re-check your bags.