Aer Lingus Flight 521 Deals & Information (2025/2026)

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Aer Lingus Flight 521 Route Deals From $58

The cheapest prices found with in the last 7 days for return flights were $109 and $58 for one-way flights to Dublin for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Oct 6 - Sat, Oct 11
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$109 Roundtrip, found 3 hours ago
$109
Roundtrip
found 3 hours ago
Select Aer Lingus flight, departing Mon, Oct 6 from Roissy-Charles de Gaulle to Dublin, returning Sat, Oct 11, priced at $109 found 3 hours ago
Tue, Oct 21 - Thu, Oct 23
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$112 Roundtrip, found 3 days ago
$112
Roundtrip
found 3 days ago
Select Aer Lingus flight, departing Tue, Oct 21 from Roissy-Charles de Gaulle to Dublin, returning Thu, Oct 23, priced at $112 found 3 days ago
Mon, Sep 29 - Wed, Oct 1
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$126 Roundtrip, found 18 hours ago
$126
Roundtrip
found 18 hours ago
Select Aer Lingus flight, departing Mon, Sep 29 from Roissy-Charles de Gaulle to Dublin, returning Wed, Oct 1, priced at $126 found 18 hours ago
Tue, Sep 2 - Wed, Oct 1
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$128 Roundtrip, found 3 days ago
$128
Roundtrip
found 3 days ago
Select Aer Lingus flight, departing Tue, Sep 2 from Roissy-Charles de Gaulle to Dublin, returning Wed, Oct 1, priced at $128 found 3 days ago
Mon, Dec 1 - Fri, Dec 5
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$130 Roundtrip, found 15 hours ago
$130
Roundtrip
found 15 hours ago
Select Aer Lingus flight, departing Mon, Dec 1 from Roissy-Charles de Gaulle to Dublin, returning Fri, Dec 5, priced at $130 found 15 hours ago
Sun, Oct 5 - Sat, Oct 11
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$132 Roundtrip, found 3 hours ago
$132
Roundtrip
found 3 hours ago
Select Aer Lingus flight, departing Sun, Oct 5 from Roissy-Charles de Gaulle to Dublin, returning Sat, Oct 11, priced at $132 found 3 hours ago
Tue, Oct 21 - Thu, Oct 23
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$135 Roundtrip, found 3 days ago
$135
Roundtrip
found 3 days ago
Select Aer Lingus flight, departing Tue, Oct 21 from Roissy-Charles de Gaulle to Dublin, returning Thu, Oct 23, priced at $135 found 3 days ago
Wed, Nov 19 - Fri, Nov 28
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$139 Roundtrip, found 11 hours ago
$139
Roundtrip
found 11 hours ago
Select Aer Lingus flight, departing Wed, Nov 19 from Roissy-Charles de Gaulle to Dublin, returning Fri, Nov 28, priced at $139 found 11 hours ago
Sun, Oct 19 - Thu, Oct 23
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$141 Roundtrip, found 10 hours ago
$141
Roundtrip
found 10 hours ago
Select Aer Lingus flight, departing Sun, Oct 19 from Roissy-Charles de Gaulle to Dublin, returning Thu, Oct 23, priced at $141 found 10 hours ago
Thu, Sep 11 - Sun, Sep 14
CDG
Roissy-Charles de Gaulle
DUB
Dublin
$143 Roundtrip, found 3 hours ago
$143
Roundtrip
found 3 hours ago
Select Aer Lingus flight, departing Thu, Sep 11 from Roissy-Charles de Gaulle to Dublin, returning Sun, Sep 14, priced at $143 found 3 hours ago

Frequently asked questions

What route does flight number EI521 take?
Flight number EI521 flies direct from CDG to Dublin Airport. During this journey, you'll be in the air for approximately 1 hour and 45 minutes. Book ahead to lock in your favorite seat.
What terminal does EI521 fly out of?
EI521 runs between Paris Airport (CDG-Roissy-Charles de Gaulle) and Dublin Airport, and travelers on this flight normally depart from Terminal 2E.
What kind of plane is on flight number EI521?
You're likely to be cruising aboard an Airbus A320 if you've reserved a seat on flight EI521. Generally, this flight sets off from Roissy Airport and comes in to land at DUB.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your EI521 flight with Travelocity, please visit our Customer Service Portal.