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Portsmouth

$917+ Cheap flights from Oshkosh, WI to Portsmouth, England

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — LHR
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
1 adult, Economy
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Cheap flight deals from Oshkosh to Portsmouth

Keep the following information in mind while searching for Oshkosh to Portsmouth flight deals. Data was last updated November 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$917
(Delta)

Popular in

January

Cheapest in

October

Average price

$1,349
Provider with most accurate pricing for Appleton Intl-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Appleton Intl-London (LON) flights.
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From Oshkosh to Portsmouth
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Highest demand for flights based on searches. 8% potential increase in price ($98 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($55 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Oshkosh to Portsmouth

Best flights from Oshkosh to Portsmouth
Discover carefully curated flight deals from Oshkosh to Portsmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 2, 2025.

This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/212:06 pmATW - SOU
2 stops38h 39mDelta
Mon 4/65:35 pmSOU - ATW
2 stops34h 04mDelta
Deal found 11/1$917

Cheapflights Fare Finder

 
Customize your flight search to find flights from Oshkosh to Portsmouth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 2, 2025.
Use the filters below to find and compare flights from Oshkosh to Portsmouth that are best for you.

Fly from

Oshkosh

Fly to

Portsmouth

Route

Depart

Return

Price

AppletonSouthampton

ATW - SOU

ATWSOU

Appleton Intl

Thu 4/2

12:06 pm-8:45 am

2 stops38h 39m

Southampton Eastleigh

Mon 4/6

5:35 pm-9:39 pm

2 stops34h 04m

$917

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Best time to book a flight from Oshkosh to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Oshkosh with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Oshkosh to Portsmouth

What is the cheapest month to book a flight from Oshkosh to Portsmouth?

Currently, October is the cheapest month in which you can book a flight from Oshkosh to Portsmouth (average of $558). Flying from Oshkosh to Portsmouth in June is currently the most expensive (average of $1,087). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from OS9 to P0R?

Find hourly flight availability from Oshkosh to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 2, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 32% on flights from Oshkosh to Portsmouth by exploring options for tickets in the evening.

Related info for your journey

Find useful and relevant information for your journey from Oshkosh to Portsmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Oshkosh to Portsmouth?

    Delta can get you from Oshkosh to Portsmouth in just under 38h 39m. Your travel time can differ by up to . The distance from Oshkosh to Portsmouth is about 3842 mi.

  • Can I find deals for flights from Oshkosh to Portsmouth that include hotel bookings?

    Yes. In addition to deals on Oshkosh to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Oshkosh to Portsmouth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Oshkosh to Portsmouth.

  • Can I find deals for business class flights from Oshkosh to Portsmouth?

    Yes. Cheapflights offers flight deals from Oshkosh to Portsmouth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Oshkosh to Portsmouth?

    Currently, October is the cheapest month in which you can book a flight from Oshkosh to Portsmouth (average of $558). Flying from Oshkosh to Portsmouth in June is currently the most expensive (average of $1,087). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 5 airlines flying from Oshkosh to Portsmouth

Discover the top 5 airlines that operate flights from Oshkosh to Portsmouth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest$632Average$879FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$650Average$824FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$676Average$897FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$687Average$1,146FlexibilityNo cancel feeOn-time71%
DeltaCheapest$749Average$1,047FlexibilityNo cancel feeOn-timeN/A

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