Denver (DEN) to Southampton (SOU) economy award flights

SOU → DEN

Lowest seen in the last 12 daysPlus fees$67.70Program

Air France-KLM Flying BlueStandard fareAirline

Delta Air LinesDepartingTue, Dec 8

Last checked 11d agoChecked 10 Oct 2026, 15:22 UTC

Which program and airline costs you least

Denver to Southampton in economy starts at 45.5K miles plus $67.70 — Delta Air Lines through Air France-KLM Flying Blue. Alaska Airlines through Atmos Rewards charges the least cash — $29.00 — but wants 175K Atmos points.

Every way to book DEN to SOU with miles or points
Airline	Program			Book
Delta Air Linesvia MSP, AMSlast seen 10 Oct, not re-checked sinceAir France-KLM Flying Blue	Air France-KLM Flying BlueStandard fare	Fewest miles45.5Kplus $67.70	$67.70
Alaska Airlinesvia SEA, DUBlast seen 10 Oct, not re-checked sinceAtmos Rewards	Atmos Rewards	175K Atmos pointsplus $29.00	Lowest fees$29.00

Where the space is over the next 60 days

Dashed days are prices last seen more than 3 days ago and not re-checked since.

DEN to SOU in economy: the facts

Over the next 60 days we hold economy seats from Denver to Southampton on 21 of the 21 departure days we have checked so far (39 days are not checked yet), through 2 programs. These figures are counted from the seats stored for those dates, not from a price history; the typical day is the median of each day's cheapest seat. Data updated October 10, 2026.

Air France-KLM Flying Blue
Days with space
18 of 21 checked
Lowest
45,500 miles
Typical day
60,500 miles
Cash on top
$68 to $169
Atmos Rewards
Days with space
3 of 21 checked
Lowest
175,000 Atmos points
Typical day
175,000 Atmos points
Cash on top
$29 to $30

DEN to SOU economy seats per program over the next 60 days
Program	Days with space	Lowest	Typical day	Cash on top
Air France-KLM Flying Blue	18 of 21 checked	45,500 miles	60,500 miles	$68 to $169
Atmos Rewards	3 of 21 checked	175,000 Atmos points	175,000 Atmos points	$29 to $30

Nonstop or with a connection

No nonstop seats in the window. With a connection on Alaska Airlines and Delta Air Lines.

How to book it

Air France-KLM Flying Blue books on airfrance.fr: sign in there, search DEN to SOU in economy on a date with space, and pay in miles with the cash on top (from $68).
Atmos Rewards books on alaskaair.com: sign in there, search DEN to SOU in economy on a date with space, and pay in Atmos points with the cash on top (from $29).

MilesZone finds the seat; it does not book it or take payment.

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Every route we watch from Denver (DEN)

Get told the moment a DEN → SOU seat opens.

We re-check that exact seat seconds before the email leaves, so what you open is still there.

Email only. Searching this route stays free for departures in the next 60 days.