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Cheap flights from Oshkosh, WI to Portsmouth, England

MKE — LHR
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Find flight deals from Oshkosh to Portsmouth

Keep the following information in mind while searching for Oshkosh to Portsmouth flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

April

Average price

$1,601
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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Highest demand for flights based on searches. 25% potential increase in price ($346 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($59 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 $1,109). 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.

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.

  • 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 $1,109). 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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Alternative routes for Oshkosh to Portsmouth

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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$622Average$979FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$632Average$850FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$650Average$825FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$663Average$1,086FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$676Average$895FlexibilityNo cancel feeOn-time69%

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