Dallal's research interests relate to refugee and asylum law and policy. She has written on current legal developments as well as on historical aspects of UK asylum and published a book on 'UK Asylum Law and Policy: Historical and Contemporary Perspectives' with Sweet & Maxwell in 2004. Recently, she has been considering the impact of globalisation on asylum and her current research has focused on the protection of refugees and forced migrants in the Middle East - see, for example, D. Stevens, 'Legal status, labelling and protection: the case of Iraqi "refugees" in Jordan' (2013) IJRL 25:1, 1-38; S. Kneebone, D. Stevens and L. Baldassar, 'Refugee Protection and the Role of Law: Conflicting Identities' (Routledge, June 2014).
Dallal has published over 30 peer reviewed journal articles, book chapters and reports. Her research has been supported by external grant income from the British Academy and the Arts and Humanities Board. She is Associate Editor of the journal Immigration, Asylum and Nationality Law.