Flights to Bonn - Rhein-Sieg from Philadelphia - $423

View $423 flight on Tue, Dec 30, 2025Opens in a new window

Popular airlines from Philadelphia to Bonn - Rhein-Sieg

  • British Airways

    British Airways

  • Air Canada

    Air Canada

  • Aer Lingus

    Aer Lingus

  • Lufthansa

    Lufthansa

  • United

    United

  • Virgin Atlantic

    Virgin Atlantic

  • Iberia

    Iberia

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Cheap Flights from Philadelphia to Bonn - Rhein-Sieg (ILG-CGN)

Prices were available within the past 7 days and start at $423 for one-way flights and $655 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Jan 27 - Wed, Feb 4
PHL
Philadelphia
QKL
Cologne
$655 Roundtrip, found 1 hour ago
$655
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Jan 27 from Philadelphia to Cologne, returning Wed, Feb 4, priced at $655 found 1 hour ago
United
Tue, Jan 27 - Tue, Feb 3
PHL
Philadelphia
QKL
Cologne
$657 Roundtrip, found 1 hour ago
$657
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Jan 27 from Philadelphia to Cologne, returning Tue, Feb 3, priced at $657 found 1 hour ago
Air Canada
Sun, Jan 25 - Wed, Feb 4
PHL
Philadelphia
QKL
Cologne
$661 Roundtrip, found 1 hour ago
$661
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Sun, Jan 25 from Philadelphia to Cologne, returning Wed, Feb 4, priced at $661 found 1 hour ago
Lufthansa
Tue, Dec 9 - Mon, Dec 15
PHL
Philadelphia
QKL
Cologne
$674 Roundtrip, found 3 days ago
$674
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Tue, Dec 9 from Philadelphia to Cologne, returning Mon, Dec 15, priced at $674 found 3 days ago
British Airways
Tue, Nov 25 - Tue, Dec 2
PHL
Philadelphia
CGN
Cologne
$692 Roundtrip, found 10 hours ago
$692
Roundtrip
found 10 hours ago
Select British Airways flight, departing Tue, Nov 25 from Philadelphia to Cologne, returning Tue, Dec 2, priced at $692 found 10 hours ago
American Airlines
Thu, Dec 4 - Tue, Dec 9
PHL
Philadelphia
CGN
Cologne
$886 Roundtrip, found 2 days ago
$886
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Dec 4 from Philadelphia to Cologne, returning Tue, Dec 9, priced at $886 found 2 days ago

Find the cheapest month to fly from Philadelphia (PHL) to Frankfurt (FRA)

May is typically the cheapest month to fly

From $454 - $1,092 per traveler.

Graph displaying average flight prices per month

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